如何可以計數不同的值在PHP關聯數組

Question

我有F8等JSON文件，我想存儲和在PHP即，對於簡單的數組的數組計數的類別

 
function array_icount_values($array) { 
    $rtarray = array(); 
    foreach($array as $value) $rtarray[strtolower($value)]++; 
    return $rtarray; 
$ar = array('red', 'green', 'blue', 'red', 'red', 'red', 'blue', 'blue', 'green'); 
//$ar = array_icount_values($re); 

其輸出將是

 
[red]=>4 
[blue]=>3 
[green]=>2 

我想同樣的結果，此文件

 
{ 
    "data": [ 
     { 
     "name": "The Lord of the Rings Trilogy (Official Page)", 
     "category": "Movie"   
     }, 
     { 
     "name": "Snatch", 
     "category": "Movie" 

     }, 
     {   "name": "The Social Network Movie", 
     "category": "Movie"   
     }, 
     {   "name": "Scarface", 
     "category": "public figure"   
     }, 
     {   "name": "Johnny Depp", 
     "category": "Actor/director"   
     }, 
     { 
     "name": "Once Upon a Time in the West", 
     "category": "public figure"   
     }, 
     {   "name": "Legend of the Guardians: The Owls of Ga'Hoole", 
     "category": "public figure"   
     }, 
     {   "name": "Once Upon a Time in America", 
     "category": "public figure"  
     }, 
     {   "name": "Butch Cassidy and the Sundance Kid", 
     "category": "public figure" 
     }, 
     {   "name": "Fracture", 
     "category": "public figure" 
       }, 
     {   "name": "Invictus", 
     "category": "public figure" 

     }, 
     { "name": "Pride and Glory", 
     "category": "public figure" 
     } 
    ] 
} 

注，我只是想要的類別數，即

[Movies]=>5 [Tv show]=>4 etc

我使用此代碼

function array_icount_values($array) { 
    $ret_ar=array(); 
    foreach($array['data'] as $key=>$val) 
    { 
     print_r(array_count_values($val)); 
    }} 
$string = file_get_contents("likes.json"); 
$json_a=json_decode($string,true); 
$re=array_icount_values($json_a);

但這給了奇怪的結果。

Answer 1

您在那裏的文本是JSON。只需使用相同的方法對它進行解碼即可計算您之前提供的功能中的類別。檢查了這一點：http://www.php.net/manual/en/function.json-decode.php

希望我能幫上忙，一路走好......

LE：

$arr=json_decode($str); 
foreach($arr['data'] as $value){ 
    $categCount[$value['category']]++; 
} 

的var_dump（$ categCount）; //應該給你的類別數