PHP str_replace have different value each time?

Question

I want to do a str_replace for a HTML String, everytime find a match item the value will increase as well.

$link = 1;

$html = str_replace($this->link, $link, $html);

This would replace all in once, and with same string $link, i would like the $link increase every time it found an match. is it possible?

Thanks very much

Use php.net/manual/en/function.preg-replace-callback.php and increment the counter in your callback function. — Dan Grossman
– Dan Grossman, Commented Apr 29, 2012 at 5:05

Menztrual · Accepted Answer · 2012-04-29 05:54:24Z

2

You can use a regular expression to return how many replacements it does.

<?php
$string = "red green green blue red";

preg_replace('/\b(green)\b/i', '[removed]', $string, -1 , $results);
echo $results; // returns '2' as it replaces green twice with [removed]
?>

edited Apr 29, 2012 at 5:54

answered Apr 29, 2012 at 5:09

Menztrual

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Comments

Sampson · Accepted Answer · 2012-04-29 05:16:05Z

1

If I understand you correctly (you want each match replaced with growing integer), it would seem the comments on the question encouraging you to use preg_replace_callback would be correct:

$str = 'Hello World';
$cnt = 0;

function myCallback ( $matches ) {
  global $cnt;
  return ++$cnt;
}

// He12o Wor3d
echo preg_replace_callback( '/\l/', 'myCallback', $str );

answered Apr 29, 2012 at 5:16

Sampson

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3 Comments

Bill Over a year ago

this myCallback, what if its in a Class? echo preg_replace_callback( '/\l/', $this->myCallback, $str ); doesn't work

Sampson Over a year ago

preg_replace_callback( '/\l/', array($this, 'myCallback'), $text);

Bill Over a year ago

preg_replace_callback( '/\l/', 'self::myCallback', $text); this works as well

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