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<?php
$var = 'ABCDEFGH:/MNRPQR/';
echo "Original: $var
\n";

/* These two examples replace all of $var with 'bob'. */
echo substr_replace($var, 'bob', 0) . "
\n";
echo substr_replace($var, 'bob', 0, strlen($var)) . "
\n";

/* Insert 'bob' right at the beginning of $var. */
echo substr_replace($var, 'bob', 0, 0) . "
\n";

/* These next two replace 'MNRPQR' in $var with 'bob'. */
echo substr_replace($var, 'bob', 10, -1) . "
\n";
echo substr_replace($var, 'bob', -7, -1) . "
\n";

/* Delete 'MNRPQR' from $var. */
echo substr_replace($var, '', 10, -1) . "
\n";
?>