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Reload this Page I want to remove non standard characters from form input
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Old 04-15-2008, 01:03 PM   · #1
baris22
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I want to remove non standard characters from form input
Hello,

What can i do to remove unwanted characters from form? I want to have numbers european letters and punctuation marks.

I just want to remove everything else.

Thanks


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Old 04-15-2008, 04:57 PM   · #2
Tree
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PHP Code:
<?php
if (!isset($_POST['submit'])){?>
    <form action="" method="POST" >
        Input : <input type="text" name="input" /><br />
        <input type="submit" value="POST" name="submit"/>
    </form>
<?php } else {
    $data = $_POST['input'];  
    $newdata = '';
    for ($x=0;$x<=strlen($data);$x++) {
        $char = substr($data,$x,1);
        $ascii = ord($char);
        $newdata .= $ascii>=32 && $ascii<=122 ? $char : '';
    }
    echo $newdata.'<br><br>';
}
?>
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Old 04-15-2008, 05:43 PM   · #3
sdsinc
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Use a regular expression like this (untested).
PHP Code:
$text = $_POST['text'];
$text = preg_replace("/[^a-z0-9-\.:,;]/i", "", $text);

so everything that does not match a thru z or punctuation like . , ; : is replaced with an empty string.
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Old 04-16-2008, 01:43 AM   · #4
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Originally Posted by Kath
Use a regular expression like this (untested).
PHP Code:
$text = $_POST['text'];
$text = preg_replace("/[^a-z0-9-\.:,;]/i", "", $text);

so everything that does not match a thru z or punctuation like . , ; : is replaced with an empty string.


Sorry if I'm incorrect, (I'm not very good with regular expressions), but shouldn't A-Z be included in the statement or else capital letters will be erased.
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Old 04-16-2008, 02:09 AM   · #5
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/i is flag to ignore case, so no need to add A-Z


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Old 04-16-2008, 05:05 AM   · #6
liam_d
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Originally Posted by zoki
/i is flag to ignore case, so no need to add A-Z


-



Exactly so it ignored everything there, A-Z is not in there so it will not ignore it, and replace?
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Old 04-16-2008, 10:37 AM   · #7
Palyriot
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Originally Posted by zoki
/i is flag to ignore case, so no need to add A-Z


-


Oh ok, thanks.
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