


$string = "Some numbers: one: 1; two: 2; three: 3 end";$ten = 10;$newstring = preg_replace_callback( '/(\\d+)/', function($match) use ($ten) { return (($match[0] + $ten)); }, $string );echo $newstring;
回复讨论(解决方案)
use 中文释义 使用
function($match) use ($ten) { return (($match[0] + $ten)); }
让变量 $ten 在匿名函数中可以被使用
相当于
$ten = 10;
function foo($match) {
global $ten;
return (($match[0] + $ten));
}
不过如果 $ten 不是全局变量的话就有麻烦了
php 5.3新增的闭包语法
闭包函数(匿名函数)可以从父作用域中继承变量 任何此类变量都应该用 use 语言结构传递进去
use 中文释义 使用
function($match) use ($ten) { return (($match[0] + $ten)); }
让变量 $ten 在匿名函数中可以被使用
相当于
$ten = 10;
function foo($match) {
global $ten;
return (($match[0] + $ten));
}
不过如果 $ten 不是全局变量的话就有麻烦了
5.2中可以替换吗?
如果不是全局变量可以就不能做了吗?$ten;
php 5.3新增的闭包语法
闭包函数(匿名函数)可以从父作用域中继承变量 任何此类变量都应该用 use 语言结构传递进去
5.2不能用吗? 没有替换方法吗?
5.2 不能用你可以这样
$string = "Some numbers: one: 1; two: 2; three: 3 end";$ten = 10;$newstring = preg_replace_callback( '/(\\d+)/', create_function('$match', "return \$match[0] + $ten;"), $string );echo $newstring;
5.2 不能用你可以这样
$string = "Some numbers: one: 1; two: 2; three: 3 end";$ten = 10;$newstring = preg_replace_callback( '/(\\d+)/', create_function('$match', "return \$match[0] + $ten;"), $string );echo $newstring;
谢谢 ,

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