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run code in 300+ PHP versions simultaneously
<?php if ( !preg_match( '/^[a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]+$/', '""<script>alert(\'haxxor\')</script>"@domain.com' ) ) { echo "This email address is considered valid."; }else { echo "fail"; }
Output for git.master, git.master_jit, rfc.property-hooks
This email address is considered valid.

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