PHP 5.5 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 5.5 is
5.5.38.
Source Code
Change Log
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core
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Disallowed JMP into a finally block.
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Added validation of class names in the autoload process.
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Fixed invalid C code in zend_strtod.c.
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Fixed ZEND_MM_MEM_TYPE=mmap_zero.
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Fixed bug
#66041 (list() fails to unpack yielded ArrayAccess object).
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Fixed bug
#65764 (generators/throw_rethrow FAIL with ZEND_COMPILE_EXTENDED_INFO).
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Fixed bug
#61645 (fopen and O_NONBLOCK).
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Fixed bug
#66218 (zend_register_functions breaks reflection).
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date
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Fixed bug
#66060 (Heap buffer over-read in DateInterval) (CVE-2013-6712).
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Fixed bug
#65768 (DateTimeImmutable::diff does not work).
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dom
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Fixed bug
#65196 (Passing DOMDocumentFragment to DOMDocument::saveHTML() Produces invalid Markup).
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exif
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Fixed bug
#65873 (Integer overflow in exif_read_data()).
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filter
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Fixed bug
#66229 (128.0.0.0/16 isn't reserved any longer).
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gd
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Fixed bug
#64405 (Use freetype-config for determining freetype2 dir(s)).
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pdo_odbc
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Fixed bug
#66311 (Stack smashing protection kills PDO/ODBC queries).
michael at orlitzky dot com
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mysqli
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Fixed bug
#65486 (mysqli_poll() is broken on win x64).
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opcache
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snmp
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soap
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Fixed bug
#66112 (Use after free condition in SOAP extension).
martin dot koegler at brz dot gv dot at
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sockets
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Fixed bug
#65923 (ext/socket assumes AI_V4MAPPED is defined).
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xsl
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Fixed bug
#49634 (Segfault throwing an exception in a XSL registered function).
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zip