tp5常用公共方法-二维数组去重(支持多字段同时匹配去重)

function moreArrayUnique($arr, $field = [], $allField = true)

{

//必须是传入数组

if (!is_array($field)) return false;

//先把二维数组中的内层数组的键值记录在在一维数组中

foreach ($arr[0] as $k => $v) $allField[] = $k;

if ($field) {

//按照顺序排字段名

foreach ($allField as $key => $val) {

if (!in_array($val, $field)) unset($allField[$key]);

}

$field = $allField;

}

foreach ($arr as $k => $v) {

foreach ($v as $key => $item) {

if (!in_array($key, $field)) unset($v[$key]);

}

//降维 用implode()也行

$v = implode(",", $v);

//保留原来的键值 $temp[]即为不保留原来键值

$temp[$k] = $v;

}

//去重：去掉重复的元素

$arr = array_unique($temp);

if ($allField) {

foreach ($arr as $k => $v) {

//拆分后的重组 如：Array( [0] => 张三 [1] => 18 )

$a = explode(",", $v);

//将原来的键与值重新合并

$arrAfter[] = array_combine($field, $a);

}

} else {

//将键值保存为一维数组

$allKey = array_keys($temp);

$arrAfter = [];

foreach ($arr as $k => $v) {

//数组去重

if (!in_array($k, $allKey)) {

unset($arr[$k]);

} else {

$a = explode(",", $v);

$arrAfter[] = array_combine($field, $a);

}
}
}
return $arrAfter ?? false;
}

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