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<?php $ptn = "/^+44/"; // Regex $str = "+447738351383"; //Your input, perhaps $_POST['textbox'] or whatever $rpltxt = "0"; // Replacement string echo preg_replace($ptn, $rpltxt, $str); ?>
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_replace(): Compilation failed: quantifier does not follow a repeatable item at offset 1 in /in/dM1XI on line 5

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