[SOLVED] php read numeric values after text

[liamthebof]

Ok, what I would like to happen is a numeric value to be returned which is after a name in letters/symbols from an text document.

 

Example:

 

Info.txt

kjbj321 knbljb354 jlknlkj4223 jnkjnlk123 kblkbn534 kjbkhb24 lhbk43 kjvbhbjv3212

 

In the php code, If I say read and search for say 'jnkjnlk' it should print on my screen 123.

 

Any idea how?

[GingerRobot]

I'd use regex:

 

$text = "kjbj321 knbljb354 jlknlkj4223 jnkjnlk123 kblkbn534 kjbkhb24 lhbk43 kjvbhbjv3212";
$searchfor = "kjbj";
preg_match("|$searchfor([0-9]+)|is",$text,$matches);
echo $matches[1];

[paul2463]

<?php
$string = "jlknlkj4223";

function getnumber($string)
{
 $count = -1;
	for ($i = 0; $i <= strlen($string); $i++)
	{
		if(!is_numeric($string[$i]))
		{
			$count++;
		}			
	}
	$return = substr($string,$count,strlen($string));
	return $return;
}
echo getnumber($string);//prints out 4223
?>

[liamthebof]

All the data is on one line on a text file called info.txt.

 

How in can I in the php say jlknlkj and It will read the file and print/echo 4223?

[liamthebof]

By mixing Ginger's method and Stream_get_contents I was able to achieve what I hoped. Thank you both for your replies.