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<?php var_dump(preg_match('foobar', 'a')); var_dump(preg_match('/foobar', 'a')); var_dump(preg_match('/fo(obar/', 'a'));
Output for 4.3.11 - 7.1.0
Warning: preg_match(): Delimiter must not be alphanumeric or backslash in /in/ar0MJ on line 3 bool(false) Warning: preg_match(): No ending delimiter '/' found in /in/ar0MJ on line 4 bool(false) Warning: preg_match(): Compilation failed: missing ) at offset 7 in /in/ar0MJ on line 5 bool(false)
Output for 4.3.0 - 4.3.10
Warning: Delimiter must not be alphanumeric or backslash in /in/ar0MJ on line 3 bool(false) Warning: No ending delimiter '/' found in /in/ar0MJ on line 4 bool(false) Warning: Compilation failed: missing ) at offset 7 in /in/ar0MJ on line 5 bool(false)