先看下面的代码:
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。
而
$GLOBALS["var2"] =&$var1; //2
在全局范围内可见。
- <?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/>";
- ?>
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。
而
$GLOBALS["var2"] =&$var1; //2
在全局范围内可见。