导读：也许你根本就没注意到OR的存在，那么先看个例子：$choice1 = wdphp.com; $choice2 = ; $default = vducn.com;$val_1 = $choice1 || $choice2 || $default; $val_2 = $choice1 or $choice2 or $default; $val_3 = ($choice1 or $choice2 or $default);echo va...
也许你根本就没注意到OR的存在，那么先看个例子：$choice1 = "wdphp.com";
$choice2 = "";
$default = "vducn.com";$val_1 = $choice1 || $choice2 || $default;
$val_2 = $choice1 or $choice2 or $default;
$val_3 = ($choice1 or $choice2 or $default);echo "val_1=$val_1 val_2=$val_2val_3=$val_3 ";$x_1 = foo() or bar();
$x_2 = $x_1 or bar();
$x_3 = ($x_1 or bar());echo "x_1=$x_1 x_2=$x_2 x_3=$x_3";function foo(){
return 0;
}function bar() {
return 1;
}运行结果是：$val_1=1 $val_2=wdphp.com $val_3=1
x_1=0 x_2=0 x_3=1你做对了吗?
另外 OR 在某种程度上还相当与 IF ，如：is_array ($variable) OR notAnArray();functionnotAnArray() {
echo "This is not an array";
}语言解释比较麻烦，还是自己试试吧
