Replace only the first specified character in a string

Hi,

i have a text in a string like this:

$mystring = "Aspect Ratio: 16:9";
or
$mystring = "Contrast: 5.000.000:1";
etc...

Code (markup):

I want to replace only the first colon ":" inside the string and leave the others.

how i can do this with php?

thanks in advance.

 

<?php
 
$mystring = "Contrast: 5.000.000:1";
 
$mystring = preg_replace('/:/','',$mystring,1);
 
echo $mystring; // Contrast 5.000.000:1
 
?>

PHP:

 

faster than regex :

 
$mystring = "Aspect Ratio: 16:9";
$result = substr($mystring, strpos($mystring, ":"));
echo trim($result);

PHP:

 

As far as I can make out that's not what the OP wanted.

 

Oops yes correct, it will only print 16:9 / 5.000.000:1 thought that's what he wanted good point. Here's the solution :

 
$mystring = "Aspect Ratio: 5.000.000:1";
echo implode("", explode(":", $mystring, 2));

PHP: