<?php $timeString = "4:29:16"; echo preg_replace_callback( '~:\K(\d{2}).*~', fn($m) => $m[1] - $m[1] % 15 . ':00', $timeString ); echo "\n---\n"; echo preg_replace_callback( '~:\K(\d{2}).*~', function($m) {return $m[1] - $m[1] % 15 . ':00';}, $timeString );
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Value for `_results` contains invalid data `array`