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run code in 200+ php & hhvm versions
Bugs & Features
<?php echo preg_match('@(?<!\<)[a-Z]@','<test, ');
Output for 5.2.3 - 7.2.0
Warning: preg_match(): Compilation failed: range out of order in character class at offset 10 in /in/6BCnH 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: range out of order in character class at offset 10 in <b>/in/6BCnH</b> on line <b>2</b><br />
Output for 4.3.11 - 4.4.2
<br /> <b>Warning</b>: preg_match(): Compilation failed: range out of order in character class at offset 10 in <b>/in/6BCnH</b> on line <b>2</b><br />
Output for 4.3.0 - 4.3.10
<br /> <b>Warning</b>: Compilation failed: range out of order in character class at offset 10 in <b>/in/6BCnH</b> on line <b>2</b><br />