PHP str_replace replacing text in string that doesnt match

Question

Im trying to run a str_replace on a 'dynamic string' coming from a user.

But everytime my function is run, it seems to output the wrong thing and i can't figure out how to fix it.

So for instance, if $payload['Name'] = 'this name'

Then when the function returns the string turns into

this name Placethis name

What seems to be happening is that its also replacing the Name inside the PlaceName in the array.

My code is as follows;

function formatThis($payload)
{
    $description = '';
    if ( array_key_exists('Description', $payload) ) {
        $description = $payload['Description'];
    }

    $placeName = '';
    if ( array_key_exists('PlaceName', $payload) ) {
        $placeName = $payload['PlaceName'];
    }

    $dynamicString = "Name PlaceName"
    $template = str_replace(
        array("Name", "Description", "PlaceName"),
        array($payload['Name'], $description, $placeName),
        $dynamicString
    );

    return $template;
}

It seems that the string actually replaces correctly to the description of the function. Its just not the behavior you like. — Koala Yeung
– Koala Yeung, Commented Sep 16, 2019 at 4:13

LF-DevJourney · Accepted Answer · 2019-09-16 04:12:56Z

1

Instead of useing str_replace, you should use `preg_replace', check the Demo

preg_replace(['/\bName\b/','/\bDescription\b/','/\bPlaceName\b/'], [$payload['Name'], $description, $placeName], $dynamicString);

answered Sep 16, 2019 at 4:12

LF-DevJourney

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1 Comment

Pablo Over a year ago

While this might work, the problem at hand is a good example were placeholders usually have a special syntax like {here} or {%here%}

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