global
$A="Hello ";
function print_A()
{
$A = "php mysql !!";
global $A; //全局变量
echo $A;
}
echo $A;
print_A();
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$A="Hello ";
function print_A()
{
$A = "php mysql !!";
global $A; //全局变量
echo $A;
}
echo $A;
print_A();
2016-10-25
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