Get everything between strings and replace with something else

Question

I am trying to get everything between the {code} tags from the $html string.

So far I have written this but this doesn't work as expected, only replacing the first {code}

Also I would like this to work for many code tags, but haven't gotten this far yet.

<?php    

$html = <<< EOT
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>{code}My test code 1{/code}</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p> 
EOT;

$startPos = strpos($html, '{code}');
$endPos = strpos($html, '{/code}');
if($startPos !== false && $endPos !== false){
    $startPos += 6; # strlen('{code}')
    $endPos += 7; # strlen('{/code}')

    // get code
    $code = substr($html, $startPos, $endPos);

    // remove all code apart from start {code}
    $html = substr($html, $startPos-6, $endPos);

    // replace new code
    $new_code = 'test';
    $html = str_replace('{code}', $new_code, $html);
}

echo $html;

Result: - http://codepad.viper-7.com/T9sbbN

testMy test code 1{/code}

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Expected Result

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

test

Lorem ipsum dolor sit amet, consectetur adipiscing elit.

if there are multiple {code}addasdf{/code} tags do you want all of them to be replaced with $new_Code? — Arian Faurtosh
As an example that it fine yes, its doing database lookup in real application. — John Magnolia

Arian Faurtosh Arian Faurtosh · Accepted Answer · 2014-04-22T21:27:47

This works for one {code}.

<?php

$html = <<< EOT
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>{code}My test code 1{/code}</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p> 
EOT;

$startPos = strpos($html, '{code}');
$endPos = strpos($html, '{/code}');

if($startPos !== false && $endPos !== false){
    $startPos += 6; # strlen('{code}')


    // get code
    $code = substr($html, $startPos, $endPos-$startPos);


    // replace new code
    $new_code = 'test';
    $html = str_replace('{code}'.$code.'{/code}', $new_code, $html);
}

echo $html;

Multiple could look like this:

<?php

$html = <<< EOT
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
<p>{code}My test code 1{/code}</p>
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.{code}hi{/code}</p> 
EOT;

$html = test($html);

echo $html;

function test($html){
    do{
        $startPos = strpos($html, '{code}');
        $endPos = strpos($html, '{/code}');

        if($startPos !== false && $endPos !== false){
            $startPos += 6; # strlen('{code}')

            // get code
            $code = substr($html, $startPos, $endPos-$startPos);

            // replace new code
            $new_code = 'test';
            $html = str_replace('{code}'.$code.'{/code}', $new_code, $html);
        }

    }while($startPos !== false && $endPos !== false);


    return $html;
}

Get everything between strings and replace with something else

2 Answers