in_array()定义和用法
in_array() 函数查找数组中是否存在指定值。 语法
in_array(value,array,type)参数 描述
value 必需。规定要在数组搜索的值。
array 必需。规定要搜索的数组。
type 可选。如果设置该参数为 true,则检查搜索的数据与数组的值的类型是否相同。 说明
如果给定的值 value 存在于数组 array 中则返回 true。如果第三个参数设置为 true,函数只有在元素存在于数组中且数据类型与给定值相同时才返回 true。 如果没有在数组中找到参数,函数返回 false。 注释:如果 value 参数是字符串,且 type 参数设置为 true,则搜索区分大小写。 例子 1
代码如下:
PHP
$people = array("Peter","Joe","Glenn","Cleveland"); if (in_array("Glenn",$people))
{
echo "Match found";
}
else
{
echo "Match not found";
}
?>
$people = array("Peter","Joe","Glenn","Cleveland"); if (in_array("Glenn",$people))
{
echo "Match found";
}
else
{
echo "Match not found";
}
?>
输出: Match found例子 2
代码如下:
PHP
$people = array("Peter","Cleveland",23); if (in_array("23",$people,TRUE))
{
echo "Match found
";
}
else
{
echo "Match not found
";
}if (in_array("Glenn",TRUE))
{
echo "Match found
";
}
else
{
echo "Match not found
";
}if (in_array(23,TRUE))
{
echo "Match found
";
}
else
{
echo "Match not found
";
}
?>
$people = array("Peter","Cleveland",23); if (in_array("23",$people,TRUE))
{
echo "Match found
";
}
else
{
echo "Match not found
";
}if (in_array("Glenn",TRUE))
{
echo "Match found
";
}
else
{
echo "Match not found
";
}if (in_array(23,TRUE))
{
echo "Match found
";
}
else
{
echo "Match not found
";
}
?>
输出:
Match not found
Match found
Match found 原文链接:https://www.f2er.com/php/27526.html