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@ 2015-12-15T18:06:24Z

<?php

function template($template, $vals)
    {
        $matches = array();
        $regex = "/\{\{(\S+)\}\}/e";
        $rendered = $template; // in case no matches are found

        preg_match_all($regex, $template, $matches, PREG_OFFSET_CAPTURE, 3);

        foreach ($matches[0] as $found) {
            $block = $found[0];
            $offset = $found[0];

            $k = str_replace('{{', '', $block);
            $k = str_replace('}-}', '', $k);

            $rendered = preg_replace($regex, '$vals[\\1]', $template);
        }

        return $rendered;
    }
    
    function template2($template, $vals)
    {
        $matches = array();
        $regex = "/\{\{(\S+)\}\}";
        $rendered = $template; // in case no matches are found

        preg_match_all($regex, $template, $matches, PREG_OFFSET_CAPTURE, 3);

        foreach ($matches[0] as $found) {
            $block = $found[0];
            $offset = $found[0];

            $k = str_replace('{{', '', $block);
            $k = str_replace('}-}', '', $k);

            $rendered = preg_replace_callback($regex, function($matches) {
                    return $matches[0];
                }, $template);
        }

        return $rendered;
    }
    
    $template = "test {{ME}}.";
    $vals = array('ME' => 'beep');
    
    echo template2($template, $vals);

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: preg_match_all(): No ending delimiter '/' found in /in/BcZDq on line 30 Warning: Undefined array key 0 in /in/BcZDq on line 32 Warning: foreach() argument must be of type array|object, null given in /in/BcZDq on line 32 test {{ME}}.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33: Warning: preg_match_all(): No ending delimiter '/' found in /in/BcZDq on line 30 Notice: Undefined offset: 0 in /in/BcZDq on line 32 Warning: Invalid argument supplied for foreach() in /in/BcZDq on line 32 test {{ME}}.
Output for 7.3.32 - 7.3.33: Warning: preg_match_all(): No ending delimiter '/' found in /in/BcZDq on line 30 Warning: Invalid argument supplied for foreach() in /in/BcZDq on line 32 test {{ME}}.

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