minor #14376 [Validator] PHP 7.4 uninitialized typed property handling (SpiGAndromeda)

javiereguiluz · javiereguiluz · commit 424c4efdd931 · 2021-01-08T17:34:24.000+01:00
This PR was submitted for the 3.4 branch but it was squashed and merged into the 4.4 branch instead. Discussion ---------- [Validator] PHP 7.4 uninitialized typed property handling The Validator component is able to handle uninitialized properties since this [PR](symfony/symfony@1edecf7) was merged. However, the behavior (null usage) is not documented in the symfony docs. P.S. PR [14375](#14375) was closed due to wrong source branch. Commits ------- 645a4d8 [Validator] PHP 7.4 uninitialized typed property handling
diff --git a/validation.rst b/validation.rst
@@ -611,6 +611,13 @@ class to have at least 3 characters.
             }
         }
 
+.. caution::
+
+    With PHP 7.4, typed properties were introduced. If a property is accessed
+    before a value is assigned (explicitly or as a default value), PHP will
+    throw an exception. To avoid that, the Validator will use ``null`` as the
+    properties value if it's uninitialized.
+
 .. index::
    single: Validation; Getter constraints
 

Original file line number	Diff line number	Diff line change
`@@ -611,6 +611,13 @@ class to have at least 3 characters.`
`611`	`611`	`}`
`612`	`612`	`}`
`613`	`613`
	`614`	`+.. caution::`
	`615`	`+`
	`616`	`+ With PHP 7.4, typed properties were introduced. If a property is accessed`
	`617`	`+ before a value is assigned (explicitly or as a default value), PHP will`
	`618`	+ throw an exception. To avoid that, the Validator will use ``null`` as the
	`619`	`+ properties value if it's uninitialized.`
	`620`	`+`
`614`	`621`	`.. index::`
`615`	`622`	`single: Validation; Getter constraints`
`616`	`623`