PHP Regular Expression Exercise: Remove all characters from a string except a-z A-Z 0-9 or " "

PHP regular expression: Exercise-7 with Solution

Write a PHP script to remove all characters from a string except a-z A-Z 0-9 or " ".

Sample string: abcde$ddfd @abcd )der]

Pictorial Presentation:

Sample Solution:

PHP Code:

<?php
$string = 'abcde$ddfd @abcd )der]';
echo 'Old string : '.$string.'
';
$newstr = preg_replace("/[^A-Za-z0-9 ]/", '', $string);
echo 'New string : '.$newstr."\n";
?>

Sample Output:

Old string : abcde$ddfd @abcd )der]                         
New string : abcdeddfd abcd der

Flowchart :

PHP Code Editor:

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