PHP-Substring-Replace
substr_replace
substr_replace -- Replace text
within a portion of a string
Description
mixed substr_replace (
mixed string, string replacement,
int start [, int length] )
substr_replace() replaces a copy
of string delimited by the start
and (optionally) length parameters
with the string given in
replacement. The result string is
returned. If string is an array
then array is returned.
If start is positive, the
replacing will begin at the
start'th offset into string.
If start is negative, the
replacing will begin at the
start'th character from the end of
string.
If length is given and is
positive, it represents the length
of the portion of string which is
to be replaced. If it is negative,
it represents the number of
characters from the end of string
at which to stop replacing. If it
is not given, then it will default
to strlen( string ); i.e. end the
replacing at the end of string.
Example 1. substr_replace()
example
<?php
$var = 'ABCDEFGH:/MNRPQR/';
echo "Original: $var<hr />\n";
/* These two examples replace
all of $var with 'bob'. */
echo substr_replace($var,
'bob', 0) . "<br />\n";
echo substr_replace($var,
'bob', 0, strlen($var)) . "<br
/>\n";
/* Insert 'bob' right at the
beginning of $var. */
echo substr_replace($var,
'bob', 0, 0) . "<br />\n";
/* These next two replace 'MNRPQR'
in $var with 'bob'. */
echo substr_replace($var,
'bob', 10, -1) . "<br />\n";
echo substr_replace($var,
'bob', -7, -1) . "<br />\n";
/* Delete 'MNRPQR' from $var.
*/
echo substr_replace($var, '',
10, -1) . "<br />\n";
?> |
Note: This function is
binary-safe.
|
