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I need to remove all special characters and spaces on a textfield for a form I'm building. How do I accomplish this in PHP.
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Use the replace() method to remove all special characters from a string, e.g. str. replace(/[^a-zA-Z0-9 ]/g, ''); . The replace method will return a new string that doesn't contain any special characters. Copied!
Your answer function clean($string) { $string = str_replace(' ', '-', $string); // Replaces all spaces with hyphens. return preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars. }
$specialChars = array(" ", "\r", "\n");
$replaceChars = array("", "", "");
$str = str_replace($specialChars, $replaceChars, $str);
This really depends, I assume you are working with $_POST[] data and wish to sanitize those inputs? If so I would definitely do something like:
$var = preg_replace("/[^A-Za-z0-9]/", "", $var);
That will strip out everything other than alpha/num, you can adjust the regex to include other characters if you wish. Some great examples of commonly used regular expressions can be found at: The RegEx Library
If this isn't quite what you are looking for or have other questions let us know.
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