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@ 2014-06-11T14:28:22Z

<?php

function str_replace_word($needle,$replacement,$haystack){
    $pattern = "/\b$needle\b/i";
    $haystack = preg_replace($pattern, $replacement, $haystack);
    return $haystack;
}

print_r(str_replace_word('ann@ibbeck.de','kan',"ann@ibbeck.de,Petermann@ibbeck.de"),true);
?>

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
preg_replace: documentation ( source)

preferences:dark modelive preview

46.28 ms | 402 KiB | 5 Q