CODEWITHSUNDEEP
phppreg-replaceassociative-arraystr-replacepreg-replace-callback
Kevin
Kevin

Reputation: 2688

String Replacements from Values in Assoc Array

I'm given a string of HTML with some "tokens" in it. They are structured like {:TOKEN_NAME:}

For instance:

<!doctype html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    {:TITLE:}
    {:DESCRIPTION:}
    {:KEYWORDS:}
    {:GOOGLE-VERIFY:}
    {:BING-VERIFY:}
    <link rel="stylesheet" href="/assets/css/base.styles.css?_=<?php echo time(); ?>" type="text/css" />
    <link rel="stylesheet" href="/assets/css/custom.css?_=<?php echo time(); ?>" type="text/css" />     

    <!--[if lt IE 9]>
        <script type="text/javascript" src="/assets/js/modernizr.min.js"></script>
    <![endif]-->

</head>
<body>
    <article data-role="page-wrapper" class="container-fluid">
        <header class="row-fluid" data-role="page-header">
            <h1 class="span5 logo pull-right"><a href="http://www.o7thwebdesign.com">o7th Web Design</a></h1>
            <nav class="span7">
                {:PAGE-CONTENT:}
            </nav>
        </header>
        <section class="row-fluid" data-role="page-container">

        </section>
        <footer class="row-fluid" data-role="page-footer">

        </footer>
    </article>
    <script type="text/javascript" src="/assets/js/scripts.js?_=<?php echo time(); ?>"></script>
    <script type="text/javascript" src="/assets/js/custom.js?_=<?php echo time(); ?>"></script>
    {:GOOGLE-UA:}
</body>
</html>

I am also given an associative array, with the token names, and what they should be replaced with, as such:

    // Populate and pull all global smarttags
    private function PullGlobalSmartTags($values){
        return array(array('Name'=>'{:TITLE:}', 'Replacement'=>'<title>' . $values[0] . '</title>'),
                     array('Name'=>'{:DESCRIPTION:}', 'Replacement'=>'<meta name="description" content="' . $values[1] . '" />'),
                     array('Name'=>'{:KEYWORDS:}', 'Replacement'=>($values[22]) ? null : '<meta name="keywords" content="' . $values[2] . '" />'),
                     array('Name'=>'{:GOOGLE-UA:}', 'Replacement'=>'<script type="text/javascript">var _gaq = _gaq || [];_gaq.push([\'_setAccount\', \'' . $values[3] . '\']);_gaq.push([\'_trackPageview\']);(function(){var ga = document.createElement(\'script\');ga.type = \'text/javascript\'; ga.async = true;ga.src = (\'https:\' == document.location.protocol ? \'https://ssl\' : \'http://www\') + \'.google-analytics.com/ga.js\';var s = document.getElementsByTagName(\'script\')[0]; s.parentNode.insertBefore(ga, s);})();</script>'),
                     array('Name'=>'{:GOOGLE-VERIFY:}', 'Replacement'=>'<meta name="google-site-verification" content="' . $values[4] . '" />'),
                     array('Name'=>'{:BING-VERIFY:}', 'Replacement'=>'<meta name="msvalidate.01" content="' . $values[5] . '" />'),
                     array('Name'=>'{:PAGE-CONTENT:}', 'Replacement'=>$values[6]),);
    }

Please assume all values in $values populate, and populate correctly (because they do...)

I know with str_replace, and preg_replace I can simply pass arrays in as my needle, replacement, and haystack, however everything I am seeing only shows non-associative arrays.

My question is, how can I do these replacements? I know that I could simply loop through the array, and do my replacements one at a time, but is there a way to do this without looping?

This does do the trick:

        for($i=0; $i<$gsCt; ++$i){
            $rettemp = str_replace($GlobalSmartTags[$i]['Name'], $GlobalSmartTags[$i]['Replacement'], $rettemp);
        }

however, I do not believe it is the most efficient method to do this.

Upvotes: 0

Views: 291

Answers (2)

mickmackusa
mickmackusa

Reputation: 47992

strtr() will very happily consume a flat associative array of needle-replacement pairs -- use array_column() to prepare/reduce the array structure.

echo strtr(
         $rettemp,
         array_column( 
             $GlobalSmartTags,
             'Replacement',  // column to become values
             'Name'  // column to become keys
         )
     );

Upvotes: 1

bansi
bansi

Reputation: 57042

Try this

$replace = PullGlobalSmartTags($values);
str_replace(array_column($replace, 'Name'), array_column($replace,'Replacement'), $html);

This only works with PHP 5 >= 5.5.0. Reference: array_column

Here is couple of suggestion till you upgrade to 5.5.0.

You can convert your replace array to single dimension array like this and replace.

$replace = PullGlobalSmartTags($value);
$kv = array();
for ($i=0;$i<count($replace);$i++){
    $kv[$replace[$i]['Name']]=$replace[$i]['Replacement'];
}
$rettemp = str_replace(array_keys($kv),array_values($kv),$rettemp);

Or you can change the function PullGlobalSmartTags to return single dimension array and use str_replace as above. You can even use the method you suggested, but it has much more replace in a loop.

I won't suggest compiling from code on production server unless there is an absolute necessity.

Upvotes: 1

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