PHP中使用 preg_match 模糊匹配

preg_match

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(PHP 4, PHP 5)

preg_match — Perform a regular expression match

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Description

int preg_match ( string $pattern , string $subject [, array $matches [, int $flags = 0 [, int $offset = 0 ]]] )

Searches subject for a match to the regular expression given in pattern.

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Parameters

pattern

The pattern to search for, as a string.

subject

The input string.

matches

If matches is provided, then it is filled with the results of search. $matches[0] will contain the text that matched the full pattern, $matches[1] will have the text that matched the first captured parenthesized subpattern, and so on.

flags

flags can be the following flag:

PREG_OFFSET_CAPTURE

If this flag is passed, for every occurring match the appendant string offset will also be returned. Note that this changes the value of matches into an array where every element is an array consisting of the matched string at offset 0 and its string offset into subject at offset 1.

PHP模糊匹配問題

/*** $array---需要被的數(shù)組* $str --- 要查詢的字符串* $return -- 返回匹配該字符串的數(shù)組的下標(biāo)集合。*/public function search($array,$str){ foreach($all as $key=$val){ $retrun = array(); // 如果$key中含有$str字符串，那么添加到數(shù)組$return中 if(stripos($key,$str) != false || stripos($key,$str) == '0') { array_push($retrun ,$key); }}return $return;}

PHP如何實(shí)現(xiàn)模糊搜索?

mysql支持自然語言的全文搜索

對(duì)于字段的要求:

只能是CHAR, VARCHAR, 或 TEXT 類型的字段

表類型是MyISAM

在表建好,并導(dǎo)入數(shù)據(jù)后,建立一個(gè)fulltext index(索引)

用法:

select 字段1,字段2,字段3, MATCH(要匹配的字段名) AGAINST('keyword') as score from table having score0

命中的每一行都會(huì)有個(gè)分?jǐn)?shù),分?jǐn)?shù)越大表示結(jié)果越接近keyword,分?jǐn)?shù)越低的就是越模糊的結(jié)果

微信用PHP開發(fā)時(shí)關(guān)鍵字怎么完全匹配和模糊匹配

模糊匹配：like %關(guān)鍵詞%

完全匹配：select 語句 直接等于關(guān)鍵詞