How To Use PHP Advanced Filters Examples

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Hi guys,

Today i will explained How To Use PHP Advanced Filters. This example is so easy to use in php. The Advanced filtered is a provided to the php in by default.

I am explained to the advance filter function in php Validate an Integer Within a Range,Validate IPv6 Address,Validate URL - Must Contain QueryString,Remove Characters With ASCII Value > 127 to explained.

So let's start to the example.

Validate an Integer Within a Range

This example uses the filter_var() function to check if a variable is both of type INT, and between 1 and 200

<?php
    $int = 122;
    $min = 1;
    $max = 200;
    if (filter_var($int, FILTER_VALIDATE_INT, array("options" => array("min_range"=>$min, "max_range"=>$max))) === false) {
        echo("Variable value is not within the legal range");
    } else {
        echo("Variable value is within the legal range");
    }
?>

Output

Variable value is within the legal range

Validate IPv6 Address

This example uses the filter_var() function to check if the variable $ip is a valid IPv6 address.

<?php
    $ip = "2001:0db8:85a3:08d3:1319:8a2e:0370:7334";
    if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) {
        echo("$ip is a valid IPv6 address");
    } else {
        echo("$ip is not a valid IPv6 address");
    }
?>

Output

2001:0db8:85a3:08d3:1319:8a2e:0370:7334 is a valid IPv6 address

Validate URL - Must Contain QueryString

This example uses the filter_var() function to check if the variable $url is a URL with a querystring

<?php
    $url = "";
    if (!filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_QUERY_REQUIRED) === false) {
      echo("$url is a valid URL with a query string");
    } else {
      echo("$url is not a valid URL with a query string");
    }
?>

Output

 is not a valid URL with a query string

Remove Characters With ASCII Value > 127

This example uses the filter_var() function to sanitize a string. It will both remove all HTML tags, and all characters with ASCII value > 127, from the string

<?php
    $str = "<h1>Hello WorldÆØÅ!</h1>";
    $newstr = filter_var($str, FILTER_SANITIZE_STRING, FILTER_FLAG_STRIP_HIGH);
    echo $newstr;
?>

Output

Hello World!

Now you can check your own.