substr_replace() function replaces the string with replacement.
Its syntax is: string substr_replace (string string, string replacement, int start [, int length])
If start is positive, replacement starts at character start.
If start is negative, replacement starts at (string length - start).
If length is positive, replacement will be length characters long.
If length is negative, replacement will end at (string length - length) characters.
<?
$favs = "is good";
$name = "A";
$favs = substr_replace($favs, $name, 0, 0);
print $favs;
?>
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