Из текстовых смайлов в графические

function buildSmileImages($text) {
return preg_replace_callback('/\:([^\B:]+)\:/', function($matches) {
static $smile_html = '<img src="/img/smiles/%s.gif" align="absmiddle" />';
static $known_smiles = array(
'smile', 'lol', 'angry'
);
return in_array($matches[1], $known_smiles) ? sprintf($smile_html, $matches[1]) : $matches[0];
}, $text);
}
echo buildSmileImages("я смайлик :smile: и вот еще один :lol: последний :angry:");

$known_smiles = array(
array('id' => '1','code' => 'B)','location' => 'cool.png','greylocation' => 'cool-grey.png','emoticonbar' => '1'),
array('id' => '2','code' => '8)','location' => 'cool.png','greylocation' => 'cool-grey.png','emoticonbar' => '0'),
array('id' => '3','code' => '8-)','location' => 'cool.png','greylocation' => 'cool-grey.png','emoticonbar' => '0'),
array('id' => '4','code' => ':-(','location' => 'sad.png','greylocation' => 'sad-grey.png','emoticonbar' => '0'),
array('id' => '5','code' => ':(','location' => 'sad.png','greylocation' => 'sad-grey.png','emoticonbar' => '1'),
array('id' => '6','code' => ':sad:','location' => 'sad.png','greylocation' => 'sad-grey.png','emoticonbar' => '0'),
array('id' => '7','code' => ':cry:','location' => 'sad.png','greylocation' => 'sad-grey.png','emoticonbar' => '0'),
);

<?php
$known_smiles = array(
array('id' => '1','code' => 'B)','location' => 'cool.png','greylocation' => 'cool-grey.png','emoticonbar' => '1'),
array('id' => '2','code' => '8)','location' => 'cool.png','greylocation' => 'cool-grey.png','emoticonbar' => '0'),
array('id' => '3','code' => '8-)','location' => 'cool.png','greylocation' => 'cool-grey.png','emoticonbar' => '0'),
array('id' => '4','code' => ':-(','location' => 'sad.png','greylocation' => 'sad-grey.png','emoticonbar' => '0'),
array('id' => '5','code' => ':(','location' => 'sad.png','greylocation' => 'sad-grey.png','emoticonbar' => '1'),
array('id' => '6','code' => ':sad:','location' => 'sad.png','greylocation' => 'sad-grey.png','emoticonbar' => '0'),
array('id' => '7','code' => ':cry:','location' => 'sad.png','greylocation' => 'sad-grey.png','emoticonbar' => '0'),
);
 
$str = "я смайлик B) и вот еще один :-( последний :sad::sad:";
 
array_map(function($v) use(&$str)
    {
        $pattern = sprintf("/%s/", preg_quote($v['code']));
        $replacement = sprintf("<img src='/img/smiles/%s' align='absmiddle'>", $v['location']);
        $str = preg_replace($pattern, $replacement, $str);
    }, $known_smiles);
 
echo $str;