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<?php error_reporting(-1); echo "\ncase 1:\n"; var_dump(preg_replace('<[^0-9+]<','','98237/242')); echo "\ncase 2:\n"; var_dump(preg_replace('<[^0-9+]>','','98237/242'));
Output for git.master, git.master_jit, rfc.property-hooks
case 1: Warning: preg_replace(): No ending matching delimiter '>' found in /in/Xke8Z on line 5 NULL case 2: string(8) "98237242"

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