php判断数组中出现的重复数

php利用array_count_values()函数来统计数组所有值的次数和指定值在数组里的出现次数。

利用array_count_values()函数输出数组所有值的出现次数

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array("A","B","C","Man","wo","A","Man");
echo "原数组：";
var_dump($arr); 

echo "数组中所有元素的出现次数：";
$count = array_count_values($arr); 
var_dump($count);
?>

利用array_count_values()函数获取指定值的出现次数

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array("A","B","C","Man","wo","A","Man");
echo "原数组：";
var_dump($arr); 

echo "数组中所有元素的出现次数：";
$count = array_count_values($arr); 
var_dump($count);
echo "字符A的出现次数：".$count["A"];
?>