PHP头条
热点:

PHP中函数内引用全局变量的方法


先看下面的代码:

<?php
$var1 = "#####";
$var2 = "&&&&&";
function global_references($use_globals) {
global $var1, $var2;
if (!$use_globals) {
$var2 =&$var1; //1
} else {
$GLOBALS["var2"] =&$var1; //2
}
}
global_references(false);
echo "var2 is set to $var2<br/>";
global_references(true);
echo "var2 is set to $var2<br/>";
?>

输出的结果如下:
var2 is set to &&&&&
var2 is set to #####
可见,上面的代码中:
$var2 =&$var1; //1
只对函数内部可见。

$GLOBALS["var2"] =&$var1; //2
在全局范围内可见。

www.phpzy.comtrue/phprm/29878.htmlTechArticlePHP中函数内引用全局变量的方法 先看下面的代码: ?php $var1 = "#####"; $var2 = ""; function global_references($use_globals) { global $var1, $var2; if (!$use_globals) { $var2 =$var1; //1 } else { $GLOBALS["var2"] =$var1; /...

相关文章

    暂无相关文章

PHP之友评论

今天推荐