注: preg_replace(), which uses a Perl-compatible regular expression syntax, is often a faster alternative to ereg_replace().
This function scans
string for matches to
pattern, then replaces the matched text with replacement.
The modified string is returned. (Which may mean that
the original string is returned if there are no matches to be
replaced.)
If pattern contains
parenthesized substrings,
replacement may contain substrings of the form \\digit, which will be replaced
by the text matching the digit'th parenthesized substring;
\\0 will produce the entire contents
of string. Up to nine substrings may be used. Parentheses may
be nested, in which case they are counted by the opening
parenthesis.
If no matches are found in
string, then
string will be returned unchanged.
For example, the following code snippet prints "This was
a test" three times:
One thing to take note of is that if you use an integer
value as the replacement
parameter, you may not get the results you expect. This is
because ereg_replace() will interpret
the number as the ordinal value of a character, and apply
that. For instance:
See also ereg(), eregi(),
eregi_replace(),
str_replace(), and
preg_match().