PHP preg_match 查找整个单词
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PHP preg_match to find whole words
提问by tintix
I'm quite new to regular expressions. Could you help me to create a pattern, which matches whole words, containing specific part? For example, if I have a text string "Perform a regular expression match" and if I search for express, it shuld give me expression, if I search for form, it should give me Performand so on. Got the idea?
我对正则表达式很陌生。你能帮我创建一个模式，匹配整个单词，包含特定部分吗？例如，如果我有一个文本字符串“执行正则表达式匹配”，并且如果我搜索express，它应该给我expression，如果我搜索form，它应该给我Perform等等。明白了吗？
回答by Linus Kleen
preg_match('/\b(express\w+)\b/', $string, $matches); // matches expression
preg_match('/\b(\w*form\w*)\b/', $string, $matches); // matches perform,
// formation, unformatted
Where:
在哪里：
\bis a word boundary\w+is one or more "word" character*\w*is zero or more "word" characters
\b是一个词边界\w+是一个或多个“单词”字符*\w*是零个或多个“单词”字符
See the manual on escape sequencesfor PCRE.
请参阅有关PCRE转义序列的手册。
* Note: although not really a "word character", the underscore _is also included int the character class \w.
* 注意：虽然不是真正的“单词字符”，但下划线_也包含在字符类中\w。
回答by Kyle Wild
This matches 'Perform':
这与“执行”匹配：
\b(\w*form\w*)\b
This matches 'expression':
这匹配“表达式”：
\b(\w*express\w*)\b
