PHP 5.4 is no longer officially supported by the PHP project.
Official support refers to that provided direct by the PHP Project.
If you install PHP via third-party packages, support timelines may be different.
Please read the Release Support Policy for more information.
The latest release of PHP 5.4 is
5.4.45.
Source Code
Change Log
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core
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Fixed bug
#69793 (Remotely triggerable stack exhaustion via recursive method calls).
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Fixed bug
#69892 (Different arrays compare indentical due to integer key truncation).
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Fixed bug
#70121 (unserialize() could lead to unexpected methods execution / NULL pointer deref).
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openssl
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Fixed bug
#70014 (openssl_random_pseudo_bytes() is not cryptographically secure).
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phar
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soap
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Fixed bug
#70081 (SoapClient info leak / null pointer dereference via multiple type confusions).
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spl
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Fixed bug
#70068 (Dangling pointer in the unserialization of ArrayObject items).
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Fixed bug
#70166 (Use After Free Vulnerability in unserialize() with SPLArrayObject).
taoguangchen at icloud dot com
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Fixed bug
#70168 (Use After Free Vulnerability in unserialize() with SplObjectStorage).
taoguangchen at icloud dot com
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Fixed bug
#70169 (Use After Free Vulnerability in unserialize() with SplDoublyLinkedList).
taoguangchen at icloud dot com