我有一个数组：
<?PHP
$array = [
'fruits' => [
'apple' => 'value','orange' => 'value'
],'vegetables' => [
'onion' => 'value','carrot' => 'value'
];
我也有一个字符串：
$string = 'fruits[orange]';
有没有办法检查字符串中指定的 – 数组键 – 是否存在于数组中？
例如：
<?PHP
if(array_key_exists($string,$array))
{
echo 'Orange exists';
}
试试这个.这里我们使用foreach和isset函数.
Note: This solution will also work for more deeper levels Ex:
fruits[orange][x][y]
Try this code snippet here
<?PHP
ini_set('display_errors',1);
$array = [
'fruits' => [
'apple' => 'value','orange' => 'value'
],'vegetables' => [
'onion' => 'value','carrot' => 'value'
]
];
$string = 'fruits[orange]';
$keys=preg_split("/\[|\]/",$string,-1,PREG_SPLIT_NO_EMPTY);
echo nestedisset($array,$keys);
function nestedisset($array,$keys)
{
foreach($keys as $key)
{
if(array_key_exists($key,$array))://checking for a key
$array=$array[$key];
else:
return false;//returning false if any of the key is not set
endif;
}
return true;//returning true as all are set.
}