3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array('1', '2', '3'); foreach ($arr as $key=>&$val) { $arr[3] = '999'; echo $val+1."\n"; }
Output for 5.4.0 - 5.4.28
Parse error: syntax error, unexpected '"\n"' (T_CONSTANT_ENCAPSED_STRING), expecting ',' or ';' in /in/vgHfY on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.28
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING, expecting ',' or ';' in /in/vgHfY on line 7
Process exited with code 255.
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184.24 ms | 1395 KiB | 65 Q