Search and replace text in any file on your server. Find and replace string in multiple files simultaneously.
使用greed和alternation替换行上最后一次出现/code/或/catalogue/之后的值。除了code或catalogue之外的其他键...
基础示例2:使用正则表达式修改文本描述:Perl和其他许多语言提供的一个正则表达式特性:替换(substiution或者叫做查找和替换(search and replace)) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #!/bin/perl #替换修改文本 #示例1 $string = "this is a demo"; $string =~ s/is/test/gi; #或者直接...
–`s/pattern/replacement/` – Search and replace a pattern in a string. –`tr/characters1/characters2/` – Transliterate characters in a string. –`grep /pattern/, @array` – Select array elements that match a pattern. –`split /pattern/, $string` – Split a string into an array base...
想必学习perl的人,对基础正则表达式都已经熟悉,所以学习perl正则会很轻松。这里我不打算解释基础正则的内容,而是直接介绍基础正则中不具备的但perl支持的功能。关于基础正则表达式的内容,可参阅基础正则表达式。 我第一个要说明的是,perl如何使用正则。还记得当初把《精通正则表达式》的书看了一遍,把perl正则也学了个七...
Perl regex search/replace FAQ: How do I replace every TAB character in a file with a comma? (More generally, how do I search for a Perl regex pattern, and replace it with a different string?) Perl regex search and replace Replacing each TAB character in a file with a comma character ...
使用greed和alternation替换行上最后一次出现/code/或/catalogue/之后的值。除了code或catalogue之外的其他键...
int preg_match(string pattern,string subject[,array matches]) //正则表达式的匹配函数 该函数有两个必选参数,第一个参数pattern需要提供用户按正则表达式语法编写的模式,第二个参数subject需要一个字符串。该函数的作用就是在第二个字符串参数中,搜索与第一个参数给出的正则表达式匹配的内容。如果提供了第三个可...
Match nth previously captured string (decimal). /a Yes Match the alarm character (BEL). /A No True at the beginning of a string. /b Yes Match the backspace character (BS). /b No True at word boundary. /B No True when not at word boundary. /cX Yes Match the ...
Takes a string and retruns it with the first character in lower case. lcfirst Str1 quotemeta rindex This function returns the position of the last occurance of the specified SEARCH string. If POSITION is specified, the occurance at or before the position is returned. The value -1 is returned...