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run code in 150+ php & hhvm versions
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<?php $result = preg_replace( '/\g|\h/', '', '/_ticket/_show/xxx' ); var_dump( $result ); exit;
based on UfpuG
Output for 4.4.9, 5.2.7 - 5.6.28, 7.0.0 - 7.1.0
Warning: preg_replace(): Compilation failed: a numbered reference must not be zero at offset 1 in /in/MtdG5 on line 2 NULL
Output for hhvm-3.10.0 - 3.12.0
Warning: Compilation failed: a numbered reference must not be zero at offset 1 in /in/MtdG5 on line 2 NULL
Output for 5.2.5 - 5.2.6
Warning: preg_replace(): Compilation failed: \g is not followed by a braced name or an optionally braced non-zero number at offset 1 in /in/MtdG5 on line 2 NULL
Output for 5.2.4
Warning: preg_replace(): Compilation failed: \g is not followed by a braced name or an optionally braced non-zero number at offset 0 in /in/MtdG5 on line 2 NULL
Output for 4.4.6 - 4.4.8, 5.2.2 - 5.2.3
Warning: preg_replace(): Compilation failed: \g is not followed by an (optionally braced) non-zero number at offset 0 in /in/MtdG5 on line 2 NULL
Output for 4.3.0 - 4.4.5, 5.0.0 - 5.2.1
string(17) "/_ticket/_sow/xxx"