3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr =[['name'=>'luo'],['age'=>22]]; echo json_encode($arr); echo json_encode($arr,true); ?> <script> var test = [<?php echo json_encode($arr,true);?>]; var test = <?php echo json_encode($arr,true);?>; alert(test); </script>

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36.57 ms | 402 KiB | 5 Q