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run code in 300+ PHP versions simultaneously
<?php $a = []; $b = $a['unknown'];
Output for 8.1.28 - 8.1.33, 8.2.17 - 8.2.29, 8.3.4 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0 - 8.5.1
Warning: Undefined array key "unknown" in /in/S6PHFI on line 4
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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