3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo md5(concatenate("1395326463","k7tzfeRVmCT2Z7HNKAxTbBPw3zWcxYPI"));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Call to undefined function concatenate() in /in/5XkZI:2 Stack trace: #0 {main} thrown in /in/5XkZI on line 2
Process exited with code 255.

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