getanwar/PHP: Email Validation Script

## PHP: Email Validation Script
// Function for email address validation
function isEmail($verify_email) {

	return(preg_match("/^[-_.[:alnum:]]+@((([[:alnum:]]|[[:alnum:]][[:alnum:]-]*[[:alnum:]])\.)+(ad|ae|aero|af|ag|ai|al|am|an|ao|aq|ar|arpa|as|at|au|aw|az|ba|bb|bd|be|bf|bg|bh|bi|biz|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|com|coop|cr|cs|cu|cv|cx|cy|cz|de|dj|dk|dm|do|dz|ec|edu|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gh|gi|gl|gm|gn|gov|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|in|info|int|io|iq|ir|is|it|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mil|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|museum|mv|mw|mx|my|mz|na|name|nc|ne|net|nf|ng|ni|nl|no|np|nr|nt|nu|nz|om|org|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|pro|ps|pt|pw|py|qa|re|ro|ru|rw|sa|sb|sc|sd|se|sg|sh|si|sj|sk|sl|sm|sn|so|sr|st|su|sv|sy|sz|tc|td|tf|tg|th|tj|tk|tm|tn|to|tp|tr|tt|tv|tw|tz|ua|ug|uk|um|us|uy|uz|va|vc|ve|vg|vi|vn|vu|wf|ws|ye|yt|yu|za|zm|zw)$|(([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5])\.){3}([0-9][0-9]?|[0-1][0-9][0-9]|[2][0-4][0-9]|[2][5][0-5]))$/i",$verify_email));

}
	// Function for email address validation
	function isEmail($verify_email) {

	return(preg_match("/^[-_.[:alnum:]]+@((([[:alnum:]]\|[[:alnum:]][[:alnum:]-]*[[:alnum:]])\.)+(ad\|ae\|aero\|af\|ag\|ai\|al\|am\|an\|ao\|aq\|ar\|arpa\|as\|at\|au\|aw\|az\|ba\|bb\|bd\|be\|bf\|bg\|bh\|bi\|biz\|bj\|bm\|bn\|bo\|br\|bs\|bt\|bv\|bw\|by\|bz\|ca\|cc\|cd\|cf\|cg\|ch\|ci\|ck\|cl\|cm\|cn\|co\|com\|coop\|cr\|cs\|cu\|cv\|cx\|cy\|cz\|de\|dj\|dk\|dm\|do\|dz\|ec\|edu\|ee\|eg\|eh\|er\|es\|et\|eu\|fi\|fj\|fk\|fm\|fo\|fr\|ga\|gb\|gd\|ge\|gf\|gh\|gi\|gl\|gm\|gn\|gov\|gp\|gq\|gr\|gs\|gt\|gu\|gw\|gy\|hk\|hm\|hn\|hr\|ht\|hu\|id\|ie\|il\|in\|info\|int\|io\|iq\|ir\|is\|it\|jm\|jo\|jp\|ke\|kg\|kh\|ki\|km\|kn\|kp\|kr\|kw\|ky\|kz\|la\|lb\|lc\|li\|lk\|lr\|ls\|lt\|lu\|lv\|ly\|ma\|mc\|md\|me\|mg\|mh\|mil\|mk\|ml\|mm\|mn\|mo\|mp\|mq\|mr\|ms\|mt\|mu\|museum\|mv\|mw\|mx\|my\|mz\|na\|name\|nc\|ne\|net\|nf\|ng\|ni\|nl\|no\|np\|nr\|nt\|nu\|nz\|om\|org\|pa\|pe\|pf\|pg\|ph\|pk\|pl\|pm\|pn\|pr\|pro\|ps\|pt\|pw\|py\|qa\|re\|ro\|ru\|rw\|sa\|sb\|sc\|sd\|se\|sg\|sh\|si\|sj\|sk\|sl\|sm\|sn\|so\|sr\|st\|su\|sv\|sy\|sz\|tc\|td\|tf\|tg\|th\|tj\|tk\|tm\|tn\|to\|tp\|tr\|tt\|tv\|tw\|tz\|ua\|ug\|uk\|um\|us\|uy\|uz\|va\|vc\|ve\|vg\|vi\|vn\|vu\|wf\|ws\|ye\|yt\|yu\|za\|zm\|zw)$\|(([0-9][0-9]?\|[0-1][0-9][0-9]\|[2][0-4][0-9]\|[2][5][0-5])\.){3}([0-9][0-9]?\|[0-1][0-9][0-9]\|[2][0-4][0-9]\|[2][5][0-5]))$/i",$verify_email));

	}