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<?php $string = '{},\"employees\":{},\"idIwant\":{\"2545\":{\"attributes\":{\"offset\":9855,'; echo preg_match('~"idIwant\\\":{\\\"\K\d+~', $string, $out) ? $out[0] : 'bonk';
Output for git.master, git.master_jit, rfc.property-hooks
2545

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