PHP Exercises: Valid an email address
PHP: Exercise-38 with Solution
Write a PHP program to valid an email address.
Sample Solution: -
PHP Code:
<?php
function valid_email($email)
{
$result = trim($email);
if (filter_var($result, FILTER_VALIDATE_EMAIL))
{
return "true";
}
else
{
echo "false";
}
}
echo valid_email("[email protected]")."\n";
echo valid_email("abc#example.com")."\n";
?>
Sample Output:
true false
Flowchart:
PHP Code Editor:
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Next: Write a PHP program to get the size of a file.
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PHP: Tips of the Day
How to Sort Multi-dimensional Array by Value?
Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:
Example:
function sortByOrder($a, $b) { return $a['order'] - $b['order']; } usort($myArray, 'sortByOrder');
Starting in PHP 5.3, you can use an anonymous function:
usort($myArray, function($a, $b) { return $a['order'] - $b['order']; });
And finally with PHP 7 you can use the spaceship operator:
usort($myArray, function($a, $b) { return $a['order'] <=> $b['order']; });
To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.
usort($myArray, function($a, $b) { $retval = $a['order'] <=> $b['order']; if ($retval == 0) { $retval = $a['suborder'] <=> $b['suborder']; if ($retval == 0) { $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder']; } } return $retval; });
If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual
Ref : https://bit.ly/3i77vCC
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