   #PHP Manual String functions substr_count substr

   PHP Manual
   Prev  Next
   ______________________________________________________________________

                                substr_replace

   (PHP 4 )
   substr_replace -- Replace text within a portion of a string

Description

   string substr_replace ( string 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 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";
   ?>

   See also str_replace() and substr().
   ______________________________________________________________________

   Prev         Home   Next
   substr_count  Up  substr
