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run code in 300+ PHP versions simultaneously
<?php $👋 = 'Hello'; $🌎 = 'World'; function 💬($🔠, $🔡) { echo $.' '.$🔡; }; 💬($👋, $🌎);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.6
Parse error: syntax error, unexpected '.', expecting variable (T_VARIABLE) or '{' or '$' in /in/7Rnuk on line 7
Process exited with code 255.

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