Challenge for ZEND PHP5 Certification - 040

[hinom 5]

Exercise 40

 

Which of the following regular expressions can be used to check the validity of an e-mail address?

 

A. ^[^@]+@[^@]+\.[^@]+$

B. ^[^@]+@[^@]+.[^@]+$

C. $[^@]+@[^@]+\.[^@]+^

D. $[^@]+@[^@]+.[^@]+^

[hinom 5]

Answer: A

 

Explanation

 

sample

<?php

$str = 'foo@barcom'; // wrong email

$rule1 = '^[^@]+@[^@]+\.[^@]+$';
if( ereg( $rule1, $str ) ){
	echo 'ok';
	}else{
	echo time();
}
echo '<hr>';
$rule1 = '^[^@]+@[^@]+.[^@]+$';
if( ereg( $rule1, $str ) ){
	echo 'ok';
	}else{
	echo time();
}

/*
	A. ^[^@]+@[^@]+\.[^@]+$
	B. ^[^@]+@[^@]+.[^@]+$
	C. $[^@]+@[^@]+\.[^@]+^
	D. $[^@]+@[^@]+.[^@]+^
*/

?>

http://php.net/regex