注: preg_match(), which uses a Perl-compatible regular expression syntax, is often a faster alternative to ereg().
Searches a string for
matches to the regular expression given in pattern.
If matches are found for parenthesized substrings of pattern and the function is
called with the third argument
regs, the matches will be stored in the elements of
the array regs. $regs[1]
will contain the substring which starts at the first left
parenthesis; $regs[2] will contain the substring starting at
the second, and so on. $regs[0] will contain a copy of the
complete string matched.
注: Up to (and including) PHP 4.1.0 $regs will be filled with exactly ten elements, even though more or fewer than ten parenthesized substrings may actually have matched. This has no effect on ereg()'s ability to match more substrings. If no matches are found, $regs will not be altered by ereg().
Searching is case sensitive.
Returns TRUE if a match
for pattern was found in
string, or FALSE if no matches were found or an
error occurred.
The following code snippet takes a date in ISO format
(YYYY-MM-DD) and prints it in DD.MM.YYYY format:
See also eregi(),
ereg_replace(),
eregi_replace(), and
preg_match().