need php function to happen just once

[jlknauff]

This function will run in Wordpress, but I need for it to happen just once per post

<?php

function internal_linking($string) {
    $string = str_ireplace(' texttoreplace ', ' <a href="http://www.msn.com">texttoreplace</a> ', $string);
    return $string;
}
add_filter('the_content', 'internal_linking');

?>

It replaces every instance of the word, but I want it to just replace the first instance. How can I fix it?

 

[abrokenshingle]

$i = 0
while $i =< 1
blah blah blah
$i++

 

[jlknauff]

Hmmm...maybe I'm doing it wrong then...

<?php

function internal_linking($string) {

    $string = str_ireplace(' texttoreplace ', ' <a href="http://www.msn.com">texttoreplace</a> ', $string);
    return $string;
}

    $i = 0;
    while ($i <= 1){
add_filter('the_content', 'internal_linking');
    $i++;
    }

?>

 

[dchuk]

don't ever fuckin use a while loop to make sure something only runs once...

<?
$var = 'abcdef abcdef abcdef';
// pattern, replacement, string, limit
echo preg_replace('/abc/', '123', $var, 1); // outputs '123def abcdef abcdef'
?>

 

[nvanprooyen]

You could grab an array and only select the first match to do the replace on. Likely will be [1][0].

edit > disregard....what dchuk said.

 

[jlknauff]

don't ever fuckin use a while loop to make sure something only runs once...

Works like a charm! Thx!

 

[kingfish]

Some people just shouldn't be programming