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run code in 300+ PHP versions simultaneously
<?php $a='h1'; $a++; echo "A: $a\n"; $b='h1'; $b+=1; echo "B: $b\n";
Output for git.master, git.master_jit, rfc.property-hooks
A: h2 Fatal error: Uncaught TypeError: Unsupported operand types: string + int in /in/mZNMm:7 Stack trace: #0 {main} thrown in /in/mZNMm on line 7
Process exited with code 255.

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