Answer by Prassd Nidode for How can I validate an email address using a regular expression?

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I use this function

function checkmail($value){        $value = trim($value);        if( stristr($value,"@") && stristr($value,".") && (strrpos($value, ".") - stripos($value, "@") > 2) && (stripos($value, "@") > 1) && (strlen($value) - strrpos($value, ".") < 6) && (strlen($value) - strrpos($value, ".") > 2) && ($value == preg_replace('/[ ]/', '', $value)) && ($value == preg_replace('/[^A-Za-z0-9\-_.@!*]/', '', $value))        ){        }else{            return "Invalid Mail-Id";        }    }