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run code in 300+ PHP versions simultaneously
<?php var_dump(base64_encode('hello')); var_dump(base_convert('hello', 256, 64));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(8) "aGVsbG8=" Fatal error: Uncaught ValueError: base_convert(): Argument #2 ($from_base) must be between 2 and 36 (inclusive) in /in/fCg0Z:5 Stack trace: #0 /in/fCg0Z(5): base_convert('hello', 256, 64) #1 {main} thrown in /in/fCg0Z on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33
string(8) "aGVsbG8=" Warning: base_convert(): Invalid `from base' (256) in /in/fCg0Z on line 5 bool(false)
Output for 4.3.0 - 4.3.1
string(8) "aGVsbG8=" Warning: base_convert() [http://www.php.net/function.base-convert]: Invalid `from base' (256) in /in/fCg0Z on line 5 bool(false)

preferences:
212.27 ms | 401 KiB | 312 Q