3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = "asd"; namespace { function strlen($str) { return "overriden" . \strlen($str); } echo strlen($foo); }
Output for 7.0.1 - 7.0.2
Fatal error: Namespace declaration statement has to be the very first statement or after any declare call in the script in /in/Jfh8P on line 5
Process exited with code 255.
Output for 5.5.24 - 5.5.31, 5.6.8 - 5.6.17, 7.0.0
Fatal error: Namespace declaration statement has to be the very first statement in the script in /in/Jfh8P on line 5
Process exited with code 255.
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