时间:2021-07-01 10:21:17 帮助过:22人阅读
$os = array("Mac", "NT", "Irix", "Linux");
if (in_array("Irix", $os)) {
echo "Got Irix";
}
if (in_array("mac", $os)) {
echo "Got mac";
}
?>
第二个条件失败,因为 in_array() 是区分大小写的,所以以上程序显示为:
Got Irix
Example #2 in_array() 严格类型检查例子
代码如下:输出:
$a = array('1.10', 12.4, 1.13);
if (in_array('12.4', $a, true)) {
echo "'12.4' found with strict check\n";
}
if (in_array(1.13, $a, true)) {
echo "1.13 found with strict check\n";
}
?>
上例将
1.13 found with strict check
Example #3 in_array() 中用数组作为 needle
代码如下:输出:
$a = array(array('p', 'h'), array('p', 'r'), 'o');
if (in_array(array('p', 'h'), $a)) {
echo "'ph' was found\n";
}
if (in_array(array('f', 'i'), $a)) {
echo "'fi' was found\n";
}
if (in_array('o', $a)) {
echo "'o' was found\n";
}
?>
上例将
'ph' was found
'o' was found
需要注意的地方:
假如:
先声明一个数组为:
$arr = array(*);
那么则有:
in_array(0, $arr) == true
令人费解! {弱语言}
解决办法:
in_array(strval(0), $arr, true))