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run code in 150+ php & hhvm versions
Bugs & Features
<?php preg_match('/[=a=]/', '');
Output for 5.2.3 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): Compilation failed: POSIX collating elements are not supported at offset 0 in /in/juRnS on line 2
Output for hhvm-3.10.0 - 3.12.0
Warning: Compilation failed: POSIX collating elements are not supported at offset 0 in /in/juRnS on line 2
Output for 4.4.3 - 5.2.2
<br /> <b>Warning</b>: preg_match() [<a href='function.preg-match'>function.preg-match</a>]: Compilation failed: POSIX collating elements are not supported at offset 0 in <b>/in/juRnS</b> on line <b>2</b><br />
Output for 4.3.11 - 4.4.2
<br /> <b>Warning</b>: preg_match(): Compilation failed: POSIX collating elements are not supported at offset 0 in <b>/in/juRnS</b> on line <b>2</b><br />
Output for 4.3.0 - 4.3.10
<br /> <b>Warning</b>: Compilation failed: POSIX collating elements are not supported at offset 0 in <b>/in/juRnS</b> on line <b>2</b><br />