m函数

描述

此匹配运算符用于匹配给定表达式中的任何关键字。起始m后面的括号可以是任何字符,将用于分隔正则表达式语句。

Regular expression variables include $, which contains whatever the last grouping match matched; $&, which contains the entire matched string; $`, which contains everything before the matched string; and $', which contains everything after the matched string.

语法

以下是此函数的简单语法-

m//

返回值

如果失败,此函数返回0,如果成功,则返回1,

无涯教程网

例

以下是显示其基本用法的示例代码-

链接：https://www.learnfk.comhttps://www.learnfk.com/perl/perl-m.html

来源：LearnFk无涯教程网

#!/usr/bin/perl -w

$string="The food is in the salad bar";
$string =~ m/foo/;
print "Before: $`\n";
print "Matched: $&\n";
print "After: $'\n";

执行上述代码后,将产生以下输出-

Before: The 
Matched: foo
After: d is in the salad bar

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