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run code in 150+ php & hhvm versions
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<?php $string = '^bar$'; if (preg_match("^\^.*?\$$", $string)) { print "true"; } else { print "false"; }
based on 9saBh
Output for 4.3.11 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_match(): No ending delimiter '^' found in /in/7asIh on line 4 false
Output for hhvm-3.10.0 - 3.12.0
Warning: No ending delimiter '^' found: [^\^.*?$$] in /in/7asIh on line 4 false
Output for 4.3.0 - 4.3.10
Warning: No ending delimiter '^' found in /in/7asIh on line 4 false