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[英]PHP: Return value associated with specific key in an array of associative arrays
[英]How to search for largest value in array, and return associated key in PHP
在這種情況下,我希望能夠返回數字15:
Array ( [420315] => 1 [21714] => 1 [20] => 1 [1] => 1 [18] => 1 [241] => 2 [15] => 5 [1038401] => 1 [114] => 1 [293641] => 1 [387] => 1 [232] => 1 [11368] => 1 [9225] => 1 [100] => 1 [9254] => 1 [15326] => 1 [9246] => 1 [97] => 1 [9241] => 1 [14242] => 1 [9456] => 1 [366] => 1 [130] => 1 [373] => 1 )
用這個
array_keys($array, max($array));
這兩個功能的參考
http://www.php.net/manual/zh/function.array-keys.php
http://php.net/manual/zh/function.max.php
$maxval = -1;
$maxkey = 0;
foreach ($arr as $key=>$val) {
if ($val >= $maxval) {
$maxval = $val;
$maxkey = $key;
}
}
return $maxkey;
假設數組為正。 否則,請為$maxval
使用適當的起始值。
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