Nameereg_replace — Performs POSIX regular expression match and replaces the matches in the subject with the specified replacement.
This function replaces any matches for the pattern with a replacement in a specified subject string. The entire string is searched for the pattern and all the matches are replaced. This allows a global search and replace to be done quickly and easily.
The replacement string can contain references of the form \n, where n is a number from 0 to 9. Before the actual replacement is performed, the function looks for these references in the replacement string and substitutes them with the text matched by the corresponding parenthesized subpattern in the pattern parameter. \0 refers to the text matched by the whole pattern, \1 refers to the text matched by the first parenthesized subpattern, and so on.
If the replacement string is specified in double quotation marks, the backslash character must be doubled. For example, the following two statements are equivalent:
$fixed = ereg_replace("(fox) (brown)", '\2 \1', $sentence); $fixed = ereg_replace("(fox) (brown)", "\\2 \\1", $sentence);
If no matches are found in the subject string, it's returned unchanged.
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