Message:

I have a text variable which contains multiple images with a relative or absolute path. I need to check if the src attribute starts with http or https then ignore it, but in case it starts with / or something like abc/ then prepend a base url.

I tried like below:

<?php

$html = <<<HTML

<img src="docs/relative/url/img.jpg" />

<img src="/docs/relative/url/img.jpg" />

<img src="https://docs/relative/url/img.jpg" />

<img src="http://docs/relative/url/img.jpg" />

HTML;



$base = 'https://example.com/';



$pattern = "/<img src=\"[^http|https]([^\"]*)\"/";

$replace = "<img src=\"" . $base . "\${1}\"";

echo $text = preg_replace($pattern, $replace, $html);

My output is:

<img src="https://example.com/ocs/relative/url/img.jpg" />

<img src="https://example.com/docs/relative/url/img.jpg" />

<img src="https://docs/relative/url/img.jpg" />

<img src="http://docs/relative/url/img.jpg" />

Issue here: I got 99% result correct, but when the src attribute started with something like docs/ then first letter of it cut off. (please check first img src in output)

Output I needed is:

<img src="https://example.com/docs/relative/url/img.jpg" /><!--check this and compare with current result, you will get the difference -->

<img src="https://example.com/docs/relative/url/img.jpg" />

<img src="https://docs/relative/url/img.jpg" />

<img src="http://docs/relative/url/img.jpg" />

Could any one help me to rectify it.

My Answer:
a URL in PHP can be done using the following code:

php

$url = "example.com/page";

$domain = "https://www.";

$newUrl = $domain . $url;



echo $newUrl;

This code will output: `https://www.example.com/page`

John Davidson

php - Add domain to <img> src attribute value if a relative path

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