mysql過程去除html標(biāo)簽的函數(shù)例子

2024-07-24 12:39:31

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mysql本身沒有去除html代碼的內(nèi)置函數(shù),但是在一些情況下,不得不在數(shù)據(jù)庫層次提取一些去除了html代碼的純文本,經(jīng)過谷歌后,找到了以下兩個函數(shù),經(jīng)測試,均可用.

SQL代碼:

SET GLOBAL log_bin_trust_function_creators=1;

DROP FUNCTION IF EXISTS fnStripTags;

DELIMITER |

CREATE FUNCTION fnStripTags( Dirty varchar(4000) )

RETURNS varchar(4000) --Vevb.com

DETERMINISTIC

BEGIN

 DECLARE iStart, iEnd, iLength int;

 WHILE Locate( '<', Dirty ) > 0 And Locate( '>', Dirty, Locate( '<', Dirty )) > 0 DO

 BEGIN

 SET iStart = Locate( '<', Dirty ), iEnd = Locate( '>', Dirty, Locate('<', Dirty ));

 SET iLength = ( iEnd - iStart) + 1;

 IF iLength > 0 THEN

 BEGIN

 SET Dirty = Insert( Dirty, iStart, iLength, '');

 END;

 END IF;

 END;

 END WHILE;

 RETURN Dirty;

END;

|

DELIMITER ;

SELECT fnStripTags('this <html>is a test, nothing more</html>');

函數(shù)2:

CREATE FUNCTION `strip_tags`($str text) RETURNS text

BEGIN

 DECLARE $start, $end INT DEFAULT 1;

 LOOP

 SET $start = LOCATE("<", $str, $start);

 IF (!$start) THEN RETURN $str; END IF;

 SET $end = LOCATE(">", $str, $start);

 IF (!$end) THEN SET $end = $start; END IF;

 SET $str = INSERT($str, $start, $end - $start + 1, "");

 END LOOP;

END;



select strip_tags('hello <a href="world">wo<>rld</a> <<x>again<.');

補充:如果你是php程序員就不需要上面的方法了,直接有現(xiàn)在的代碼.

<?php

$text = 'Test paragraph. <a href="#fragment">Other text</a>';

echo strip_tags($text);

echo " ";

// 允許 和 <a>

echo strip_tags($text, '<a>');

?>

//以上例程會輸出：

Test paragraph. Other text

Test paragraph. <a href="#fragment">Other text</a>