preg_replace to replace the number in substring php

Question

I have below string

$string = 'id="0000001" did="659" interval="2" media.jpg'

I want to replace 2 (value is dynamic 0 to 1000) in interval tag with 0. How can I do it?

I tried following code but it replaces all

$returnValue = preg_replace('/\\d+/', '0', $string, -1, $count);

vks · Accepted Answer · 2015-08-25 08:22:35Z

4

$returnValue = preg_replace('/(?<=interval=")\\d+/', '0', $string, -1, $count);

Just include a lookbehind stating interval=" should be present before the \\d+ you are trying to find.

answered Aug 25, 2015 at 8:22

vks

68.1k11 gold badges96 silver badges132 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

@BhumiShah use (?<=interval=["'])\d+ for that

@BhumiShah $re = "/(?<=interval=[\"'])\\d+/m";

mocak · Accepted Answer · 2015-08-25 08:56:42Z

0

This is an another way to do this without using lookbehind assertion however using lookbehind is much cooler.

preg_replace('/(interval=")(\d+)/','${1}0', $string, -1, $count);

answered Aug 25, 2015 at 8:56

mocak

4052 gold badges5 silver badges12 bronze badges