3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = &$b = 2; echo $a.' - '.$b; $a = 4; echo $a.' - '.$b; $b = 5; echo $a.' - '.$b;
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.28, 5.4.0 - 5.4.25
Parse error: syntax error, unexpected '=' in /in/R67hS on line 2
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '=' in /in/R67hS on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/R67hS on line 2
Process exited with code 255.
preferences:
216.18 ms | 1395 KiB | 115 Q