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<?php $a = "ab"; echo preg_replace("/(a)|(b)/", "+$2+|-$1-");
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: preg_replace() expects at least 3 arguments, 2 given in /in/ZnT04:5 Stack trace: #0 /in/ZnT04(5): preg_replace('/(a)|(b)/', '+$2+|-$1-') #1 {main} thrown in /in/ZnT04 on line 5
Process exited with code 255.

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