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ereg
Regular expression match
(PHP 4, PHP 5)
int ereg ( string pattern, string string [, array ®s] )
Parameters
- pattern
Case sensitive regular expression.
- string
The input string.
- regs
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.
Return Values
Returns the length of the matched string if a match for
pattern was found in string,
or FALSE if no matches were found or an error occurred.
If the optional parameter regs was not passed or the length of the matched string is 0, this function returns 1.
Examples
Example 1894. ereg() example
The following code snippet takes a date in ISO format (YYYY-MM-DD) and prints it in DD.MM.YYYY format:
<?php
if (ereg ("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})", $date, $regs)) {
echo "$regs[3].$regs[2].$regs[1]";
} else {
echo "Invalid date format: $date";
}
?>
Notes
preg_match(), which uses a Perl-compatible regular expression syntax, is often a faster alternative to ereg().