ereg_replace
(PHP 4, PHP 5)
ereg_replace — Replace regular expression
설명
string ereg_replace
( string $pattern
, string $replacement
, string $string
)
This function scans string for matches to
pattern, then replaces the matched text
with replacement.
Warning이 함수는 PHP 5.3.0부터
배제됩니다.
이 기능에 의존하지 않기를 권합니다.
인수
-
pattern
-
A POSIX extended regular expression.
-
replacement
-
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.
-
string
-
The input string.
반환값
The modified string is returned. If no matches are found in
string, then it will be returned unchanged.
예제
For example, the following code snippet prints "This was a test"
three times:
Example #1 ereg_replace() example
<?php
$string = "This is a test";
echo str_replace(" is", " was", $string);
echo ereg_replace("( )is", "\\1was", $string);
echo ereg_replace("(( )is)", "\\2was", $string);
?>
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:
Example #2 ereg_replace() example
<?php
/* This will not work as expected. */
$num = 4;
$string = "This string has four words.";
$string = ereg_replace('four', $num, $string);
echo $string; /* Output: 'This string has words.' */
/* This will work. */
$num = '4';
$string = "This string has four words.";
$string = ereg_replace('four', $num, $string);
echo $string; /* Output: 'This string has 4 words.' */
?>
Example #3 Replace URLs with links
<?php
$text = ereg_replace("[[:alpha:]]+://[^<>[:space:]]+[[:alnum:]/]",
'<a href="\\0">\\0</a>', $text);
?>
주의
Note:
PHP 5.3.0부터 regex 확장은
배제되었습니다. PCRE 확장이 같은 기능을
합니다. 이 함수를 호출하면 E_DEPRECATED 주의가
발생합니다. PCRE로 변환하는 데 필요한 도움은 차이점 목록을 참고하십시오.
Tip
ereg_replace() is deprecated as of PHP 5.3.0. preg_replace()
is the suggested alternative to this function.