processing this string with php

Question

I have a text string that looks like this

var1=red&var2=green&var3=blue&var4=magenta

How can manipulate this string isolate the value of var2 which in this case is green

IamSimon · Accepted Answer · 2010-11-30 02:10:00Z

7

Use the php function parse_str() to convert it to an array.

answered Nov 30, 2010 at 2:10

IamSimon

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speshak · Accepted Answer · 2010-11-30 02:11:05Z

3

I'd start with parse_url What you have looks close enough to an URL param string that you might as well use the built in methods for handling URLs.

answered Nov 30, 2010 at 2:11

speshak

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deceze · Accepted Answer · 2010-11-30 02:09:33Z

3

parse_str($str, $vars);
echo $vars['var2'];

answered Nov 30, 2010 at 2:09

deceze♦

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Niet the Dark Absol · Accepted Answer · 2010-11-30 02:09:45Z

3

Try this:

parse_str($str,$tmp);
// $tmp['var2'] is now what you're looking for

answered Nov 30, 2010 at 2:09

Niet the Dark Absol

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mauris · Accepted Answer · 2010-11-30 02:09:49Z

1

You can use parse_str function to parse the string into an array / variables. In this case I prefer outputting to array instead of variables to prevent the pollution of namespace.

<?php

$str = 'var1=red&var2=green&var3=blue&var4=magenta';

parse_str($str, $output);

$result = null;
foreach($output as $k => $v){
    if($v == 'green'){
        $result = $k;
        break;
    }
}

?>

answered Nov 30, 2010 at 2:09

mauris

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