diff --git a/docs/capabilities.md b/docs/capabilities.md
index 17e55d88..4e2c82b5 100644
--- a/docs/capabilities.md
+++ b/docs/capabilities.md
@@ -88,7 +88,7 @@ Auto-generated by `script/capability-matrix.php`. Do not edit by hand.
 | `sizeof` | yes | yes | yes | standard |  |
 | `sort` | yes | yes | yes | standard |  |
 | `sqrt` | yes | yes | yes | standard |  |
-| `str_contains` | yes | yes | yes | standard |  |
+| `str_contains` | yes | yes | yes | standard | AOT PHPT |
 | `str_ends_with` | yes | yes | yes | standard | AOT PHPT |
 | `str_pad` | yes | yes | yes | standard | AOT PHPT |
 | `str_repeat` | yes | yes | yes | standard | AOT PHPT |
diff --git a/src/llvm-env.php b/src/llvm-env.php
index 0d9f9d9b..a359a38b 100644
--- a/src/llvm-env.php
+++ b/src/llvm-env.php
@@ -8,7 +8,15 @@
  * putenv('LD_LIBRARY_PATH') does not affect in-process dlopen on glibc; preload bundled
  * dependencies with dlopen(RTLD_GLOBAL) before libLLVM is opened via FFI.
  */
-$llvmDir = dirname(__DIR__) . '/.llvm';
+$repoRoot = dirname(__DIR__);
+$llvmDir = '';
+if (is_file($repoRoot.'/.llvm/libLLVM-9.so.1')) {
+    $llvmDir = $repoRoot.'/.llvm';
+} elseif (getenv('PHP_COMPILER_LLVM_PATH') && is_file(getenv('PHP_COMPILER_LLVM_PATH').'/libLLVM-9.so.1')) {
+    $llvmDir = getenv('PHP_COMPILER_LLVM_PATH');
+} elseif (is_file('/opt/llvm9/libLLVM-9.so.1')) {
+    $llvmDir = '/opt/llvm9';
+}
 
 /**
  * @param list<string> $names Basenames under $dir (e.g. libffi.so.7).
@@ -50,7 +58,7 @@ function php_compiler_preload_llvm_deps(string $dir, array $names): void
     }
 }
 
-if (is_file($llvmDir . '/libLLVM-9.so.1')) {
+if ('' !== $llvmDir && is_file($llvmDir . '/libLLVM-9.so.1')) {
     putenv('PHP_COMPILER_LLVM_PATH=' . $llvmDir);
     $ldPath = getenv('LD_LIBRARY_PATH');
     putenv('LD_LIBRARY_PATH=' . $llvmDir . (false === $ldPath || '' === $ldPath ? '' : ':' . $ldPath));
@@ -58,7 +66,7 @@ function php_compiler_preload_llvm_deps(string $dir, array $names): void
     $_SERVER['LD_LIBRARY_PATH'] = $_ENV['LD_LIBRARY_PATH'];
     php_compiler_preload_llvm_deps($llvmDir, ['libffi.so.7']);
 }
-if (is_executable($llvmDir . '/clang-9')) {
+if ('' !== $llvmDir && is_executable($llvmDir . '/clang-9')) {
     $path = getenv('PATH');
     putenv('PATH=' . $llvmDir . (false === $path ? '' : ':' . $path));
     $_ENV['PATH'] = getenv('PATH');
diff --git a/test/BaseTest.php b/test/BaseTest.php
index f31ef304..e720b714 100755
--- a/test/BaseTest.php
+++ b/test/BaseTest.php
@@ -235,16 +235,7 @@ protected function normalize(string $string): string {
      */
     protected static function applyLlvmToolchainEnv(array &$env): void
     {
-        $llvmDir = dirname(__DIR__).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return;
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-        $ld = $env['LD_LIBRARY_PATH'] ?? '';
-        $env['LD_LIBRARY_PATH'] = '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = $env['PATH'] ?? '';
-        $env['PATH'] = '' === $path ? $prefix : $prefix.':'.$path;
+        LlvmToolchain::applyProcessEnv($env, dirname(__DIR__));
     }
 
     /**
@@ -252,22 +243,7 @@ protected static function applyLlvmToolchainEnv(array &$env): void
      */
     protected static function llvmEnvPrefix(): array
     {
-        $llvmDir = dirname(__DIR__).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return [];
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $ld = getenv('LD_LIBRARY_PATH');
-        $ldVal = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = getenv('PATH');
-        $pathVal = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-
-        return [
-            'env',
-            'LD_LIBRARY_PATH='.$ldVal,
-            'PATH='.$pathVal,
-            'PHP_COMPILER_LLVM_PATH='.$prefix,
-        ];
+        return LlvmToolchain::envPrefix(dirname(__DIR__));
     }
 
 }
\ No newline at end of file
diff --git a/test/LlvmToolchain.php b/test/LlvmToolchain.php
new file mode 100644
index 00000000..49b1ead5
--- /dev/null
+++ b/test/LlvmToolchain.php
@@ -0,0 +1,103 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PHPCompiler;
+
+/**
+ * Resolve LLVM 9 for JIT/AOT tests (mirrors script/php-env.sh).
+ */
+final class LlvmToolchain
+{
+    private static ?bool $ready = null;
+
+    /**
+     * @return non-empty-string|null
+     */
+    public static function resolveDir(?string $repoRoot = null): ?string
+    {
+        $candidates = [];
+        if (null !== $repoRoot) {
+            $candidates[] = $repoRoot.'/.llvm';
+        }
+        $fromEnv = getenv('PHP_COMPILER_LLVM_PATH');
+        if (false !== $fromEnv && '' !== $fromEnv) {
+            $candidates[] = $fromEnv;
+        }
+        $candidates[] = '/opt/llvm9';
+
+        foreach ($candidates as $dir) {
+            if (is_file($dir.'/libLLVM-9.so.1')) {
+                $resolved = realpath($dir);
+
+                return false !== $resolved ? $resolved : $dir;
+            }
+        }
+
+        return null;
+    }
+
+    public static function isReady(?string $repoRoot = null): bool
+    {
+        if (null !== self::$ready) {
+            return self::$ready;
+        }
+        $dir = self::resolveDir($repoRoot);
+        if (null === $dir) {
+            self::$ready = false;
+
+            return false;
+        }
+        if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
+            putenv('PHP_COMPILER_LLVM_PATH='.$dir);
+            $_ENV['PHP_COMPILER_LLVM_PATH'] = $dir;
+            $_SERVER['PHP_COMPILER_LLVM_PATH'] = $dir;
+        }
+        try {
+            \PHPLLVM\Chooser::choose();
+            self::$ready = true;
+        } catch (\Throwable $e) {
+            self::$ready = false;
+        }
+
+        return self::$ready;
+    }
+
+    /**
+     * @param array<string, string> $env
+     */
+    public static function applyProcessEnv(array &$env, ?string $repoRoot = null): void
+    {
+        $dir = self::resolveDir($repoRoot);
+        if (null === $dir) {
+            return;
+        }
+        $env['PHP_COMPILER_LLVM_PATH'] = $dir;
+        $ld = $env['LD_LIBRARY_PATH'] ?? '';
+        $env['LD_LIBRARY_PATH'] = '' === $ld ? $dir : $dir.':'.$ld;
+        $path = $env['PATH'] ?? '';
+        $env['PATH'] = '' === $path ? $dir : $dir.':'.$path;
+    }
+
+    /**
+     * @return list<string>
+     */
+    public static function envPrefix(?string $repoRoot = null): array
+    {
+        $dir = self::resolveDir($repoRoot);
+        if (null === $dir) {
+            return [];
+        }
+        $ld = getenv('LD_LIBRARY_PATH');
+        $ldVal = false === $ld || '' === $ld ? $dir : $dir.':'.$ld;
+        $path = getenv('PATH');
+        $pathVal = false === $path || '' === $path ? $dir : $dir.':'.$path;
+
+        return [
+            'env',
+            'LD_LIBRARY_PATH='.$ldVal,
+            'PATH='.$pathVal,
+            'PHP_COMPILER_LLVM_PATH='.$dir,
+        ];
+    }
+}
diff --git a/test/aot/AotTest.php b/test/aot/AotTest.php
index d8d9f2f7..24716360 100644
--- a/test/aot/AotTest.php
+++ b/test/aot/AotTest.php
@@ -32,23 +32,7 @@ private static function isLlvmReady(): bool
         if (null !== self::$llvmReady) {
             return self::$llvmReady;
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            self::$llvmReady = false;
-
-            return false;
-        }
-        if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
-            putenv('PHP_COMPILER_LLVM_PATH='.$llvmDir);
-            $_ENV['PHP_COMPILER_LLVM_PATH'] = $llvmDir;
-            $_SERVER['PHP_COMPILER_LLVM_PATH'] = $llvmDir;
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-            self::$llvmReady = true;
-        } catch (\Throwable $e) {
-            self::$llvmReady = false;
-        }
+        self::$llvmReady = LlvmToolchain::isReady(dirname(__DIR__, 2));
 
         return self::$llvmReady;
     }
@@ -77,15 +61,7 @@ public function testCases(string $name, string $code, array $sections): void
                 $env[$key] = $value;
             }
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-            $ld = $env['LD_LIBRARY_PATH'] ?? '';
-            $env['LD_LIBRARY_PATH'] = '' === $ld ? $prefix : $prefix.':'.$ld;
-            $path = $env['PATH'] ?? '';
-            $env['PATH'] = '' === $path ? $prefix : $prefix.':'.$path;
-        }
+        LlvmToolchain::applyProcessEnv($env, $repoRoot);
         if (isset($sections['ENV'])) {
             foreach (explode("\n", trim($sections['ENV'])) as $line) {
                 $line = trim($line);
diff --git a/test/aot/ExampleWebAotTest.php b/test/aot/ExampleWebAotTest.php
index 1399c20a..77cb3c29 100644
--- a/test/aot/ExampleWebAotTest.php
+++ b/test/aot/ExampleWebAotTest.php
@@ -100,15 +100,7 @@ private function llvmProcessEnv(string $repoRoot): array
                 $env[$key] = $value;
             }
         }
-        $llvmDir = $repoRoot.'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-            $ld = $env['LD_LIBRARY_PATH'] ?? '';
-            $env['LD_LIBRARY_PATH'] = '' === $ld ? $prefix : $prefix.':'.$ld;
-            $path = $env['PATH'] ?? '';
-            $env['PATH'] = '' === $path ? $prefix : $prefix.':'.$path;
-        }
+        LlvmToolchain::applyProcessEnv($env, $repoRoot);
 
         return $env;
     }
@@ -147,21 +139,7 @@ private static function isLlvmReady(): bool
         if (null !== self::$llvmReady) {
             return self::$llvmReady;
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            self::$llvmReady = false;
-
-            return false;
-        }
-        if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
-            putenv('PHP_COMPILER_LLVM_PATH='.$llvmDir);
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-            self::$llvmReady = true;
-        } catch (\Throwable $e) {
-            self::$llvmReady = false;
-        }
+        self::$llvmReady = LlvmToolchain::isReady(dirname(__DIR__, 2));
 
         return self::$llvmReady;
     }
@@ -171,21 +149,6 @@ private static function isLlvmReady(): bool
      */
     private static function llvmEnvPrefix(): array
     {
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return [];
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $ld = getenv('LD_LIBRARY_PATH');
-        $ldVal = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = getenv('PATH');
-        $pathVal = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-
-        return [
-            'env',
-            'LD_LIBRARY_PATH='.$ldVal,
-            'PATH='.$pathVal,
-            'PHP_COMPILER_LLVM_PATH='.$prefix,
-        ];
+        return LlvmToolchain::envPrefix(dirname(__DIR__, 2));
     }
 }
diff --git a/test/aot/NestedSuperglobalsAotTest.php b/test/aot/NestedSuperglobalsAotTest.php
index 9edaa8ad..290897cd 100644
--- a/test/aot/NestedSuperglobalsAotTest.php
+++ b/test/aot/NestedSuperglobalsAotTest.php
@@ -102,15 +102,7 @@ private static function llvmEnvironment(string $repoRoot): array
                 $env[$key] = $value;
             }
         }
-        $llvmDir = $repoRoot.'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-            $ld = $env['LD_LIBRARY_PATH'] ?? '';
-            $env['LD_LIBRARY_PATH'] = '' === $ld ? $prefix : $prefix.':'.$ld;
-            $path = $env['PATH'] ?? '';
-            $env['PATH'] = '' === $path ? $prefix : $prefix.':'.$path;
-        }
+        LlvmToolchain::applyProcessEnv($env, $repoRoot);
 
         return $env;
     }
@@ -120,21 +112,7 @@ private static function isLlvmReady(): bool
         if (null !== self::$llvmReady) {
             return self::$llvmReady;
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            self::$llvmReady = false;
-
-            return false;
-        }
-        if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
-            putenv('PHP_COMPILER_LLVM_PATH='.$llvmDir);
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-            self::$llvmReady = true;
-        } catch (\Throwable $e) {
-            self::$llvmReady = false;
-        }
+        self::$llvmReady = LlvmToolchain::isReady(dirname(__DIR__, 2));
 
         return self::$llvmReady;
     }
@@ -171,21 +149,6 @@ private static function phpCommand(): array
      */
     private static function llvmEnvPrefix(): array
     {
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return [];
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $ld = getenv('LD_LIBRARY_PATH');
-        $ldVal = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = getenv('PATH');
-        $pathVal = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-
-        return [
-            'env',
-            'LD_LIBRARY_PATH='.$ldVal,
-            'PATH='.$pathVal,
-            'PHP_COMPILER_LLVM_PATH='.$prefix,
-        ];
+        return LlvmToolchain::envPrefix(dirname(__DIR__, 2));
     }
 }
diff --git a/test/aot/RuntimeSuperglobalRefreshTest.php b/test/aot/RuntimeSuperglobalRefreshTest.php
index d7047a3a..4ceecaf6 100644
--- a/test/aot/RuntimeSuperglobalRefreshTest.php
+++ b/test/aot/RuntimeSuperglobalRefreshTest.php
@@ -161,15 +161,7 @@ private function llvmProcessEnv(string $repoRoot): array
                 $env[$key] = $value;
             }
         }
-        $llvmDir = $repoRoot.'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-            $ld = $env['LD_LIBRARY_PATH'] ?? '';
-            $env['LD_LIBRARY_PATH'] = '' === $ld ? $prefix : $prefix.':'.$ld;
-            $path = $env['PATH'] ?? '';
-            $env['PATH'] = '' === $path ? $prefix : $prefix.':'.$path;
-        }
+        LlvmToolchain::applyProcessEnv($env, $repoRoot);
 
         return $env;
     }
@@ -179,21 +171,7 @@ private static function isLlvmReady(): bool
         if (null !== self::$llvmReady) {
             return self::$llvmReady;
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            self::$llvmReady = false;
-
-            return false;
-        }
-        if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
-            putenv('PHP_COMPILER_LLVM_PATH='.$llvmDir);
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-            self::$llvmReady = true;
-        } catch (\Throwable $e) {
-            self::$llvmReady = false;
-        }
+        self::$llvmReady = LlvmToolchain::isReady(dirname(__DIR__, 2));
 
         return self::$llvmReady;
     }
@@ -230,21 +208,6 @@ private static function phpCommand(): array
      */
     private static function llvmEnvPrefix(): array
     {
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return [];
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $ld = getenv('LD_LIBRARY_PATH');
-        $ldVal = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = getenv('PATH');
-        $pathVal = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-
-        return [
-            'env',
-            'LD_LIBRARY_PATH='.$ldVal,
-            'PATH='.$pathVal,
-            'PHP_COMPILER_LLVM_PATH='.$prefix,
-        ];
+        return LlvmToolchain::envPrefix(dirname(__DIR__, 2));
     }
 }
diff --git a/test/aot/StdlibWebBuiltinsTest.php b/test/aot/StdlibWebBuiltinsTest.php
index c2d78e23..9e77be55 100644
--- a/test/aot/StdlibWebBuiltinsTest.php
+++ b/test/aot/StdlibWebBuiltinsTest.php
@@ -101,15 +101,7 @@ private static function llvmEnvironment(string $repoRoot): array
                 $env[$key] = $value;
             }
         }
-        $llvmDir = $repoRoot.'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-            $ld = $env['LD_LIBRARY_PATH'] ?? '';
-            $env['LD_LIBRARY_PATH'] = '' === $ld ? $prefix : $prefix.':'.$ld;
-            $path = $env['PATH'] ?? '';
-            $env['PATH'] = '' === $path ? $prefix : $prefix.':'.$path;
-        }
+        LlvmToolchain::applyProcessEnv($env, $repoRoot);
 
         return $env;
     }
@@ -119,21 +111,7 @@ private static function isLlvmReady(): bool
         if (null !== self::$llvmReady) {
             return self::$llvmReady;
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            self::$llvmReady = false;
-
-            return false;
-        }
-        if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
-            putenv('PHP_COMPILER_LLVM_PATH='.$llvmDir);
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-            self::$llvmReady = true;
-        } catch (\Throwable $e) {
-            self::$llvmReady = false;
-        }
+        self::$llvmReady = LlvmToolchain::isReady(dirname(__DIR__, 2));
 
         return self::$llvmReady;
     }
@@ -172,21 +150,6 @@ private static function phpCommand(): array
      */
     private static function llvmEnvPrefix(): array
     {
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return [];
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $ld = getenv('LD_LIBRARY_PATH');
-        $ldVal = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = getenv('PATH');
-        $pathVal = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-
-        return [
-            'env',
-            'LD_LIBRARY_PATH='.$ldVal,
-            'PATH='.$pathVal,
-            'PHP_COMPILER_LLVM_PATH='.$prefix,
-        ];
+        return LlvmToolchain::envPrefix(dirname(__DIR__, 2));
     }
 }
diff --git a/test/aot/WebAppNumberFormatTest.php b/test/aot/WebAppNumberFormatTest.php
index 5aecba68..84136d99 100644
--- a/test/aot/WebAppNumberFormatTest.php
+++ b/test/aot/WebAppNumberFormatTest.php
@@ -98,15 +98,7 @@ private static function llvmEnvironment(string $repoRoot): array
                 $env[$key] = $value;
             }
         }
-        $llvmDir = $repoRoot.'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-            $ld = $env['LD_LIBRARY_PATH'] ?? '';
-            $env['LD_LIBRARY_PATH'] = '' === $ld ? $prefix : $prefix.':'.$ld;
-            $path = $env['PATH'] ?? '';
-            $env['PATH'] = '' === $path ? $prefix : $prefix.':'.$path;
-        }
+        LlvmToolchain::applyProcessEnv($env, $repoRoot);
 
         return $env;
     }
@@ -116,21 +108,7 @@ private static function isLlvmReady(): bool
         if (null !== self::$llvmReady) {
             return self::$llvmReady;
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            self::$llvmReady = false;
-
-            return false;
-        }
-        if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
-            putenv('PHP_COMPILER_LLVM_PATH='.$llvmDir);
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-            self::$llvmReady = true;
-        } catch (\Throwable $e) {
-            self::$llvmReady = false;
-        }
+        self::$llvmReady = LlvmToolchain::isReady(dirname(__DIR__, 2));
 
         return self::$llvmReady;
     }
@@ -169,21 +147,6 @@ private static function phpCommand(): array
      */
     private static function llvmEnvPrefix(): array
     {
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return [];
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $ld = getenv('LD_LIBRARY_PATH');
-        $ldVal = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = getenv('PATH');
-        $pathVal = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-
-        return [
-            'env',
-            'LD_LIBRARY_PATH='.$ldVal,
-            'PATH='.$pathVal,
-            'PHP_COMPILER_LLVM_PATH='.$prefix,
-        ];
+        return LlvmToolchain::envPrefix(dirname(__DIR__, 2));
     }
 }
diff --git a/test/bootstrap.php b/test/bootstrap.php
index c273cc0c..62757b83 100644
--- a/test/bootstrap.php
+++ b/test/bootstrap.php
@@ -9,3 +9,4 @@
 require __DIR__.'/../src/yay-php8-compat.php';
 require __DIR__.'/../src/llvm-env.php';
 require __DIR__.'/../vendor/autoload.php';
+require __DIR__.'/LlvmToolchain.php';
diff --git a/test/compliance/JITTest.php b/test/compliance/JITTest.php
index 97639578..c3804dfc 100755
--- a/test/compliance/JITTest.php
+++ b/test/compliance/JITTest.php
@@ -16,17 +16,10 @@ class JITTest extends BaseTest {
 
     public function setUp(): void {
         $this->BIN = realpath(__DIR__ . '/../../bin/jit.php');
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
-                putenv('PHP_COMPILER_LLVM_PATH='.$prefix);
-            }
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-        } catch (\Throwable $e) {
-            $this->markTestSkipped('LLVM not available for JIT tests: '.$e->getMessage());
+        if (!LlvmToolchain::isReady(dirname(__DIR__, 2))) {
+            $this->markTestSkipped(
+                'LLVM 9 toolchain not available. Run script/install-llvm9.sh or use the 22.04-dev Docker image.'
+            );
         }
     }
 
diff --git a/test/fixtures/aot/cases/str_contains.phpt b/test/fixtures/aot/cases/str_contains.phpt
new file mode 100644
index 00000000..dfe7c1d6
--- /dev/null
+++ b/test/fixtures/aot/cases/str_contains.phpt
@@ -0,0 +1,12 @@
+--TEST--
+AOT: str_contains() for request path / user-agent style checks
+--FILE--
+<?php
+$path = '/api/v1/users';
+echo str_contains($path, '/api/') ? 'api' : 'no', "\n";
+echo str_contains($path, 'users') ? 'users' : 'no', "\n";
+echo str_contains($path, 'admin') ? 'admin' : 'no', "\n";
+--EXPECT--
+api
+users
+no
diff --git a/test/real/ServeAotTest.php b/test/real/ServeAotTest.php
index de418e45..cdd054d1 100644
--- a/test/real/ServeAotTest.php
+++ b/test/real/ServeAotTest.php
@@ -128,15 +128,7 @@ private function httpGetAot(string $docroot, string $binary, string $path): stri
     private function llvmEnv(): array
     {
         $env = [];
-        $llvmDir = $this->repoRoot.'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-            $ld = getenv('LD_LIBRARY_PATH');
-            $env['LD_LIBRARY_PATH'] = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-            $path = getenv('PATH');
-            $env['PATH'] = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-        }
+        LlvmToolchain::applyProcessEnv($env, $this->repoRoot);
 
         return $env;
     }
@@ -197,18 +189,7 @@ private static function isLlvmReady(): bool
         if (null !== self::$llvmReady) {
             return self::$llvmReady;
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            self::$llvmReady = false;
-
-            return false;
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-            self::$llvmReady = true;
-        } catch (\Throwable $e) {
-            self::$llvmReady = false;
-        }
+        self::$llvmReady = LlvmToolchain::isReady(dirname(__DIR__, 2));
 
         return self::$llvmReady;
     }
@@ -218,21 +199,6 @@ private static function isLlvmReady(): bool
      */
     private static function llvmEnvPrefix(): array
     {
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return [];
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $ld = getenv('LD_LIBRARY_PATH');
-        $ldVal = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = getenv('PATH');
-        $pathVal = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-
-        return [
-            'env',
-            'LD_LIBRARY_PATH='.$ldVal,
-            'PATH='.$pathVal,
-            'PHP_COMPILER_LLVM_PATH='.$prefix,
-        ];
+        return LlvmToolchain::envPrefix(dirname(__DIR__, 2));
     }
 }
diff --git a/test/unit/ExamplesCompileTest.php b/test/unit/ExamplesCompileTest.php
index 32dd096b..6545c4d4 100644
--- a/test/unit/ExamplesCompileTest.php
+++ b/test/unit/ExamplesCompileTest.php
@@ -140,15 +140,7 @@ private function llvmProcessEnv(string $repoRoot): array
                 $env[$key] = $value;
             }
         }
-        $llvmDir = $repoRoot.'/.llvm';
-        if (is_file($llvmDir.'/libLLVM-9.so.1')) {
-            $prefix = realpath($llvmDir) ?: $llvmDir;
-            $env['PHP_COMPILER_LLVM_PATH'] = $prefix;
-            $ld = $env['LD_LIBRARY_PATH'] ?? '';
-            $env['LD_LIBRARY_PATH'] = '' === $ld ? $prefix : $prefix.':'.$ld;
-            $path = $env['PATH'] ?? '';
-            $env['PATH'] = '' === $path ? $prefix : $prefix.':'.$path;
-        }
+        LlvmToolchain::applyProcessEnv($env, $repoRoot);
 
         return $env;
     }
@@ -186,21 +178,7 @@ private static function isLlvmReady(): bool
         if (null !== self::$llvmReady) {
             return self::$llvmReady;
         }
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            self::$llvmReady = false;
-
-            return false;
-        }
-        if ('' === getenv('PHP_COMPILER_LLVM_PATH')) {
-            putenv('PHP_COMPILER_LLVM_PATH='.$llvmDir);
-        }
-        try {
-            \PHPLLVM\Chooser::choose();
-            self::$llvmReady = true;
-        } catch (\Throwable $e) {
-            self::$llvmReady = false;
-        }
+        self::$llvmReady = LlvmToolchain::isReady(dirname(__DIR__, 2));
 
         return self::$llvmReady;
     }
@@ -210,21 +188,6 @@ private static function isLlvmReady(): bool
      */
     private static function llvmEnvPrefix(): array
     {
-        $llvmDir = dirname(__DIR__, 2).'/.llvm';
-        if (!is_file($llvmDir.'/libLLVM-9.so.1')) {
-            return [];
-        }
-        $prefix = realpath($llvmDir) ?: $llvmDir;
-        $ld = getenv('LD_LIBRARY_PATH');
-        $ldVal = false === $ld || '' === $ld ? $prefix : $prefix.':'.$ld;
-        $path = getenv('PATH');
-        $pathVal = false === $path || '' === $path ? $prefix : $prefix.':'.$path;
-
-        return [
-            'env',
-            'LD_LIBRARY_PATH='.$ldVal,
-            'PATH='.$pathVal,
-            'PHP_COMPILER_LLVM_PATH='.$prefix,
-        ];
+        return LlvmToolchain::envPrefix(dirname(__DIR__, 2));
     }
 }