3v4l.org

run code in 300+ PHP versions simultaneously
<?php $m1=10; $m2=20; for($i=1; $i<3; $i++){ echo {$m$i}; } ?>
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.32
Parse error: syntax error, unexpected '{' in /in/4Dpl5 on line 7
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '{' in /in/4Dpl5 on line 7
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '{', expecting ',' or ';' in /in/4Dpl5 on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected '{', expecting ',' or ';' in /in/4Dpl5 on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `','' or `';'' in /in/4Dpl5 on line 7
Process exited with code 255.
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221.5 ms | 1395 KiB | 123 Q