3v4l.org

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<?php $arrOne = [1, 3, 4]; $arrTwo = [2, 5,]; array_splice( $arrOne, 1, 0, $arrTwo[0]); array_splice( $arrOne, 4, 0, $arrTwo[1]); var_dump($arrOne);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(5) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) [4]=> int(5) }
preferences:
121.17 ms | 407 KiB | 5 Q