使用array_column 和in_array:如果你需要在一个多维数组中查找一个值,可以使用 array_column 函数从数组中提取一个特定列,然后使用 in_array 函数检查该列中的值是否存在。$multiDimensionalArray = array( array('id' => 1, 'name' => 'value1'), array('id' => 2, 'name' => 'value2'), array(...
function in_array_recursive($needle, $haystack) { foreach ($haystack as $item) { if ($item == $needle || (is_array($item) && in_array_recursive($needle, $item))) { return true; } } return false; } $multiDimensionalArray = [[1, 2], [3, 4]]; $value = 3; if (in_array...
In the previous pages, we have described arrays that are a single list of key/value pairs.However, sometimes you want to store values with more than one key. For this, we have multidimensional arrays.PHP - Multidimensional ArraysA multidimensional array is an array containing one or more ...
function isMultiDimensionalArray($array) { return count($array) !== count(array_values($array)); } $array = [1, 2, 3]; var_dump(isMultiDimensionalArray($array)); // 输出: false $array = [1, [2, 3]]; var_dump(isMultiDimensionalArray($array)); // 输出: true “` 方法二:使用a...
我使用 in_array() 来检查一个值是否存在于如下数组中, $a = array("Mac", "NT", "Irix", "Linux"); if (in_array("Irix", $a)) { echo "Got Irix"; } //print_r($a); 但是多维数组(下图)呢?如何检查该值是否存在于多数组中? $b = array(array("Mac", "NT"), array("Irix", ...
Multidimensional Arrays A multidimensional array is an array in which each element may also be an array, and each element in the sub-array can also be an array or have another array within it, and so on. Below is an example of a multidimensional array. main.php Output 1234567891011121314151...
Find Size of Multidimensional Array Using PHP count() To find the size of a Multidimensional array, you can use the PHPcount()that takes an argument as the variable of the array. It checks for the number of elements inside an array and prints the size in the output as given below: ...
= array_merge($result, flattenArray($element)); } else { $result[] = $element; } } return $result; } $multiDimensionalArray = array(array(1, 2), array(3, 4), array(array(5, 6), array(7, 8))); $flattenedArray = flattenArray($multiDimensionalArray); print_r($flattenedA...
<?php // Define a function to filter unique values based on a specified key in a multidimensional array function unique_array($my_array, $key) { $result = array(); // Initialize an empty array to store the unique values $i = 0; // Initialize a counter $key_array = array(); //...
array_unique multidimensional phpMarqueIV <?php function super_unique($array,$key) { $temp_array = []; foreach ($array as &$v) { if (!isset($temp_array[$v[$key]])) $temp_array[$v[$key]] =& $v; } $array = array_values($temp_array); return $array; } $arr=""; $arr...