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run code in 300+ PHP versions simultaneously
<?php $a1 = range(1,25); $a2 = range(1,25); $r = array_map('compare', $a1, $a2); function compare($v1, $v2) { echo $v1.'--'.$v2; }
Output for git.master, git.master_jit, rfc.property-hooks
1--12--23--34--45--56--67--78--89--910--1011--1112--1213--1314--1415--1516--1617--1718--1819--1920--2021--2122--2223--2324--2425--25

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