How to Validate Nigerian Phone Number Using PHP

By: Unknown on 18:25

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I was on a project that an SMS is required to be sent to a subscriber which must be a Nigerian Mobile Number in other to manage their SMS Units, that is what led me into writing a function to validate Nigerian phone numbers.



This is a simple PHP function which validates a phone number to reach the required standard of:

• Must be numeric


• Must start from 080, 090, 070 and 081 right?


• Must be 11 digits in length

Now let's go, this my custom function returns 5 outputs which are:

• 111 = input is not a digit


• 110 = not starting from 080, 070, 081, 090


• 120 = not 11 characters


• 200 = its okay


• 0 = empty input

Copy out the below function

<?php
function check_number($number) {
	/*
	111 = input is not a digit
	110 = not starting from 080, 070, 081, 090
	120 = not 11 characters
	200 = its okay
	0 = empty input
	*/

	//Lets really know if the input is not empty, which if it is, return false
	if(!$number) {
		return false;
	}

	//Checking if its really numerics
	elseif(!is_numeric($number)) {
		return 111;
	}

	//Checking if number starts with 080, 090, 070 and 081
	elseif(!preg_match('/^080/', $number) and !preg_match('/^070/', $number) and !preg_match('/^090/', $number) and !preg_match('/^081/', $number)) {
		return 110;
	}

	//Check if the length is 11 digits
	elseif(strlen($number)!==11) {
		return 120;
	}

	//Every requirements are made
	else {
		return 200;
	}
}
?>

Use this function like:

<?php
echo check_number(08179751185); 
?>