PHP counts the number of elements of a one-dimensional array value identical to num, and converts it to subscript as a number, and the value is a two-dimensional array of both value and num

PHP counts the number of elements of a one-dimensional array value equal to num, and converts it to a two-dimensional array of subscript numbers, value and num

A recent project that queries a field from a database to get an array key is a one-dimensional array of channel $res, and now needs to turn this array into a key that is the number value is channel and num (num is the same channel number, the default is 0).

$res Array

Array (size=2)  0 = string ' 0 ' (length=1)  1 = = String ' 500000009 ' (length=9)  2 = String ' 500000009 ' (length=9)

$rs Array

Array (size=2)  0 = = int 1  500000009 = int 2

$arr Array

Array (size=2)  0 = =     Array (size=2)      ' channel ' = + int 0      ' num ' + int 1  1 = =     Array (size =2)      ' channel ' = = int 500000009      ' num ' = int 2

Working with Code

foreach ($res as $v) {//Get a key is a one-dimensional array of channel values as numbers    $rs [$v]++;} $arr = Array (); foreach ($rs as $key = = $value) {//Convert an array of Rs to a key is a number, the value is a two-dimensional array of channel and Num    $arr []  = Array (' channel ' = > $key, ' num ' = $value);}

