ereg_replace
eregi_replace
POSIX Regex 함수 목록
PHP Manual

# ereg

(PHP 4, PHP 5)

ereg — Regular expression match

### 설명

int ereg ( string `$pattern` , string `$string` [, array `&$regs` ] )

Searches a `string` for matches to the regular expression given in `pattern` in a case-sensitive way.

### 인수

`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.

### 반환값

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.

### 변경점

버전 | 설명
--- | ---
4.1.0 | 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().

### 예제

Example #1 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";
}
?>`

### 주의

> Note: As of PHP 5.3.0 the regex extension is deprecated, calling this function will issue an `E_DEPRECATED` notice.

> Note: preg_match(), which uses a Perl-compatible regular expression syntax, is often a faster alternative to ereg().

### 참고

- eregi() - Case insensitive regular expression match
- ereg_replace() - Replace regular expression
- eregi_replace() - Replace regular expression case insensitive
- preg_match() - 정규표현식 매치를 수행
- strpos() - 문자열이 처음 나타나는 위치를 찾습니다
- strstr() - 문자열이 처음으로 나오는 부분을 찾습니다
- quotemeta() - 메타 문자를 인용

ereg_replace
eregi_replace
POSIX Regex 함수 목록
PHP Manual