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PHP FILTER_SANITIZE_STRING Filter

Complete PHP Filter Reference

Definition and Usage

The FILTER_SANITIZE_STRING filter strips or encodes unwanted characters.

This filter removes data that is potentially harmful for your application. It is used to strip tags and remove or encode unwanted characters.

Name: "string"
ID-number: 513

Possible options and flags:

FILTER_FLAG_NO_ENCODE_QUOTES - This flag does not encode quotes
FILTER_FLAG_STRIP_LOW - Strip characters with ASCII value below 32
FILTER_FLAG_STRIP_HIGH - Strip characters with ASCII value above 127
FILTER_FLAG_ENCODE_LOW - Encode characters with ASCII value below 32
FILTER_FLAG_ENCODE_HIGH - Encode characters with ASCII value above 127
FILTER_FLAG_ENCODE_AMP - Encode the & character to &

Example

<?php
$var="<b>Peter Griffin<b>";

var_dump(filter_var($var, FILTER_SANITIZE_STRING));
?>

The output of the code will be:

string(13) "Peter Griffin"