01-21-2013
Quote:
Originally Posted by
qwertyu
i do not require to replace that with "Replaced". i want to take out that string - "Replace_12123_31233_32134_12342" and do certain operations with it
Didn't you write
"How do i replace "Replace_12123_31233_32134_1234" in the above string.??" earlier?
Quote:
Originally Posted by
qwertyu
... this might be a different string everytime... but the position of the string wouldnt change..
Please elaborate on this aspect. At what position will "this" string occur in the bigger string? Does "this" string terminate with a space/end-of-bigger-string? or does "this" string have a fixed length?
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LEARN ABOUT PHP
mb_ereg_replace_callback
MB_EREG_REPLACE_CALLBACK(3) 1 MB_EREG_REPLACE_CALLBACK(3)
mb_ereg_replace_callback - Perform a regular expresssion seach and replace with multibyte support using a callback
SYNOPSIS
string mb_ereg_replace_callback (string $pattern, callable $callback, string $string, [string $option = "msr"])
DESCRIPTION
Scans $string for matches to $pattern, then replaces the matched text with the output of $callback function.
The behavior of this function is almost identical to mb_ereg_replace(3), except for the fact that instead of $replacement parameter, one
should specify a $callback.
PARAMETERS
o $pattern
- The regular expression pattern. Multibyte characters may be used in $pattern.
o $callback
- A callback that will be called and passed an array of matched elements in the $subject string. The callback should return the
replacement string. You'll often need the $callback function for a mb_ereg_replace_callback(3) in just one place. In this case
you can use an anonymous function to declare the callback within the call to mb_ereg_replace_callback(3). By doing it this way you
have all information for the call in one place and do not clutter the function namespace with a callback function's name not used
anywhere else.
o $string
- The string being checked.
o $option
- Matching condition can be set by $option parameter. If i is specified for this parameter, the case will be ignored. If x is
specified, white space will be ignored. If m is specified, match will be executed in multiline mode and line break will be
included in '.'. If p is specified, match will be executed in POSIX mode, line break will be considered as normal character. Note
that e cannot be used for mb_ereg_replace_callback(3).
RETURN VALUES
The resultant string on success, or FALSE on error.
NOTES
Note
The internal encoding or the character encoding specified by mb_regex_encoding(3) will be used as the character encoding for this
function.
EXAMPLES
Example #1
mb_ereg_replace_callback(3) example
<?php
// this text was used in 2002
// we want to get this up to date for 2003
$text = "April fools day is 04/01/2002
";
$text.= "Last christmas was 12/24/2001
";
// the callback function
function next_year($matches)
{
// as usual: $matches[0] is the complete match
// $matches[1] the match for the first subpattern
// enclosed in '(...)' and so on
return $matches[1].($matches[2]+1);
}
echo mb_ereg_replace_callback(
"(d{2}/d{2}/)(d{4})",
"next_year",
$text);
?>
The above example will output:
April fools day is 04/01/2003
Last christmas was 12/24/2002
Example #2
mb_ereg_replace_callback(3) using anonymous function supported in PHP 5.3.0 or later
<?php
// this text was used in 2002
// we want to get this up to date for 2003
$text = "April fools day is 04/01/2002
";
$text.= "Last christmas was 12/24/2001
";
echo mb_ereg_replace_callback(
"(d{2}/d{2}/)(d{4})",
function ($matches) {
return $matches[1].($matches[2]+1);
},
$text);
?>
SEE ALSO
mb_regex_encoding(3), mb_ereg_replace(3), Anonymous functions, information about the callback type.
PHP Documentation Group MB_EREG_REPLACE_CALLBACK(3)