How to replace the key of an array in php
Oct 12, 2020 am 11:37 AMHow to replace the key of an array in php: You can use the array_combine() function to replace it, such as [array_combine($key_name,$arr_old);]. This function can merge two arrays and use one of the array elements as the key.
Function introduction:
array_combine() function creates a new array by merging two arrays, one of which is the key name. , the elements of another array are key values.
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Note:
The number of elements in the key name array and the key value array must be the same!
Code implementation:
// 需要替换 key 的数组 $arr_old = array( '0' => array('id' => 1, 'name' => 'Carroll'), '1' => array('id' => 2, 'name' => 'Chrdai'), '3' => array('id' => 3, 'name' => 'xiaodai'), ); // 将新的key定义一个新数组 $key_name = array('key1','key2','key3'); // 现在开始替换 $arr_new = array_combine($key_name,$arr_old); var_dump($arr_new); /* array (size=3) 'key1' => array (size=2) 'id' => int 1 'name' => string 'Carroll' (length=7) 'key2' => array (size=2) 'id' => int 2 'name' => string 'Chrdai' (length=6) 'key3' => array (size=2) 'id' => int 3 'name' => string 'xiaodai' (length=7) */
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