php获取数组中重复数据的两种方法
（1）利用php提供的函数，array_unique和array_diff_assoc来实现
复制代码 代码如下:
function FetchRepeatMemberInArray($array) {
// 获取去掉重复数据的数组
$unique_arr = array_unique ( $array );
// 获取重复数据的数组
$repeat_arr = array_diff_assoc ( $array, $unique_arr );
return $repeat_arr;
}
// 测试用例
$array = array (
'apple',
'iphone',
'miui',
'apple',
'orange',
'orange'
);
$repeat_arr = FetchRepeatMemberInArray ( $array );
print_r ( $repeat_arr );
?>
（2）自己写函数实现这个功能，利用两次for循环
复制代码 代码如下:
function FetchRepeatMemberInArray($array) {
$len = count ( $array );
for($i = 0; $i for($j = $i + 1; $j if ($array [$i] == $array [$j]) {
$repeat_arr [] = $array [$i];
break;
}
}
}
return $repeat_arr;
}
// 测试用例
$array = array (
'apple',
'iphone',
'miui',
'apple',
'orange',
'orange'
);
$repeat_arr = FetchRepeatMemberInArray ( $array );
print_r ( $repeat_arr );
?>
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