<?php $array = [ 125 => '3110 - with a string', 128 => '3009 - keep a string', 126 => '3111 - a string', 121 => '3114 - be a string', 122 => '3113 - last string', ]; function cmp($a, $b) { return strcmp(trim(explode('-',$a)[1]) ,trim(explode('-',$b)[1])); } usort($array, "cmp"); print_r($array);
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Value for `_results` contains invalid data `array`