php统计数组中相同元素个数的方法
关联数组一般不能进行分组统计,可以通过array_values()函数对数组元素进行分组统计!
$arr = array( 'a'=>'java', 'b'=>'php', 'c'=>'java', ); $arr = array_values($arr); //返回数组所有的值,并建立数字索引 $arr1 = array(); foreach ($arr as $a){ if (!isset($arr1[$a])){ $arr1[$a] = 1; }else { $arr1[$a]++; } } echo "<table border='1' cellpadding='5'>"; foreach($arr1 as $k=>$val){ echo "<tr><td>$k</td><td>$val</td></tr>"; } echo "</table>";
PHP 中的 array_count_values() 函数可以实现
array_count_values() 函数用于统计数组中所有值出现的次数。
本函数返回一个数组,其元素的键名是原数组的值,键值是该值在原数组中出现的次数。
array_count_values(array)
例如:
$a=array("Cat","Dog","Horse","Dog"); print_r(array_count_values($a));
输出:
Array ( [Cat] => 1 [Dog] => 2 [Horse] => 1 )

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