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<?php $a = [ 'sss4444dfdf', //лишние '444444', //много 'sdfsdf', //все не то '', // '4', //мало ]; $i = 0; echo($tmp = preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++])? $tmp : 0).PHP_EOL; echo($tmp = preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++])? $tmp : 0).PHP_EOL; echo($tmp = preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++])? $tmp : 0).PHP_EOL; echo($tmp = preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++])? $tmp : 0).PHP_EOL; echo($tmp = preg_filter('/^\D*(\d{2,4}).*$/', '$1', $a[$i++])? $tmp : 0).PHP_EOL;
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $tmp in /in/kn2jD on line 10 0 0 0

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