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php数组工具种

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Release： 2016-06-13 13:02:09
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php数组工具类

PHP二维数组去重复项函数 

<?php
function unique_array_2d($array2D,$stkeep=false,$ndformat=true)
{
	// 判断是否保留一级数组键 (一级数组键可以为非数字)
	if($stkeep) $stArr = array_keys($array2D);

	// 判断是否保留二级数组键 (所有二级数组键必须相同)
	if($ndformat) $ndArr = array_keys(end($array2D));

	//降维,也可以用implode,将一维数组转换为用逗号连接的字符串
	foreach ($array2D as $v){
		$v = join(",",$v); 
		$temp[] = $v;
	}

	//去掉重复的字符串,也就是重复的一维数组
	$temp = array_unique($temp); 

	//再将拆开的数组重新组装
	foreach ($temp as $k => $v)
	{
		if($stkeep) $k = $stArr[$k];
		if($ndformat)
		{
			$tempArr = explode(",",$v); 
			foreach($tempArr as $ndkey => $ndval) $output[$k][$ndArr[$ndkey]] = $ndval;
		}
		else $output[$k] = explode(",",$v); 
	}

	return $output;
}

$array2D = array(
	'first'=>array('title'=>'1111','date'=>'2222'),
	'second'=>array('title'=>'1111','date'=>'2222'),
	'third'=>array('title'=>'2222','date'=>'3333')
);

echo "<pre class="brush:php;toolbar:false">";
print_r(unique_array_2d($array2D,true));

/**
* 将二维数组通过指定的 key 去重
*
* @param array $arr 要去重的数组
* @param array $by  指定key去重,该参数不指定将返回 array()
* @return array
*/
function array_multunique($arr,$by = array()) {
	$temp = array();
	foreach($arr as $key => $val) {
		foreach($by as $v) {
			$temp[$key] .= isset($val[$v]) ? $val[$v] : '';
		}
	}
	return array_intersect_key($arr,array_unique($temp));
}
/*$aa = array (  
    array ('id' => 123, 'name' => '张三' ),   
    array ('id' => 123, 'name' => '李四' ),   
    array ('id' => 124, 'name' => '王五' ),   
    array ('id' => 125, 'name' => '赵六' ),   
    array ('id' => 126, 'name' => '赵六' )   
);  
$key = 'id';  
array_multunique ($aa, array('id')); */

function array_remove_key($array,$keys){
	if (!is_array($array) || !is_array($keys)){
		return false;
	}
	foreach($array as $t){
		foreach($keys as $k){
			unset($t[$k]);
		}
		$doc[]=$t;
	}
	return $doc;

}
/*$array = array(
	'0' => array('a' => 'aaaaa', 'b' => 'bbbbb', 'c' => array('d' => 'ddddd', 'e' => 'eeeee')),
	'1' => array('a' => 'aaaaa', 'b' => 'bbbbb', 'c' => array('d' => 'ddddd', 'e' => 'eeeee'))
);
print_r( array_remove_key($array,array('c')));*/

function array_remove_key_val(&$a,$b,$c){
	foreach ($a as $key=>$value){
		if ( isset($value[$b]) && ($value[$b]==$c) ){
			unset($a[$key]);
		}
	}
}
/*$a=array(
	array('id'=>1,'num'=>10,'type'=>'news'),
	array('id'=>2,'num'=>100,'type'=>'pic')
);
print_r( array_remove_key_val($a,"id","1") );*/
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数组<=>xml 相互转换http://hudeyong926.iteye.com/blog/836048 

<?php
/**
 * 从数组中删除空白的元素（包括只有空白字符的元素）
 *
 * @param array $arr
 * @param boolean $trim
 */
function array_remove_empty(& $arr, $trim = true)
{
    foreach ($arr as $key => $value) {
        if (is_array($value)) {
            array_remove_empty($arr[$key]);
        } else {
            $value = trim($value);
            if ($value == '') {
                unset($arr[$key]);
            } elseif ($trim) {
                $arr[$key] = $value;
            }
        }
    }
}

/**
 * 从一个二维数组中返回指定键的所有值
 *
 * @param array $arr
 * @param string $col
 *
 * @return array
 */
function array_col_values(& $arr, $col)
{
    $ret = array();
    foreach ($arr as $row) {
        if (isset($row[$col])) { $ret[] = $row[$col]; }
    }
    return $ret;
}

/**
 * 将一个二维数组转换为 hashmap
 *
 * 如果省略 $valueField 参数，则转换结果每一项为包含该项所有数据的数组。
 *
 * @param array $arr
 * @param string $keyField
 * @param string $valueField
 *
 * @return array
 */
function array_to_hashmap(& $arr, $keyField, $valueField = null)
{
    $ret = array();
    if ($valueField) {
        foreach ($arr as $row) {
            $ret[$row[$keyField]] = $row[$valueField];
        }
    } else {
        foreach ($arr as $row) {
            $ret[$row[$keyField]] = $row;
        }
    }
    return $ret;
}

/**
 * 将一个二维数组按照指定字段的值分组
 *
 * @param array $arr
 * @param string $keyField
 *
 * @return array
 */
function array_group_by(& $arr, $keyField)
{
    $ret = array();
    foreach ($arr as $row) {
        $key = $row[$keyField];
        $ret[$key][] = $row;
    }
    return $ret;
}

/**
 * 将一个平面的二维数组按照指定的字段转换为树状结构
 *
 * 当 $returnReferences 参数为 true 时，返回结果的 tree 字段为树，refs 字段则为节点引用。
 * 利用返回的节点引用，可以很方便的获取包含以任意节点为根的子树。
 *
 * @param array $arr 原始数据
 * @param string $fid 节点ID字段名
 * @param string $fparent 节点父ID字段名
 * @param string $fchildrens 保存子节点的字段名
 * @param boolean $returnReferences 是否在返回结果中包含节点引用
 *
 * return array
 */
function array_to_tree($arr, $fid, $fparent = 'parent_id',
    $fchildrens = 'childrens', $returnReferences = false)
{
    $pkvRefs = array();
    foreach ($arr as $offset => $row) {
        $pkvRefs[$row[$fid]] =& $arr[$offset];
    }

    $tree = array();
    foreach ($arr as $offset => $row) {
        $parentId = $row[$fparent];
        if ($parentId) {
            if (!isset($pkvRefs[$parentId])) { continue; }
            $parent =& $pkvRefs[$parentId];
            $parent[$fchildrens][] =& $arr[$offset];
        } else {
            $tree[] =& $arr[$offset];
        }
    }
    if ($returnReferences) {
        return array('tree' => $tree, 'refs' => $pkvRefs);
    } else {
        return $tree;
    }
}

/**
 * 将树转换为平面的数组
 *
 * @param array $node
 * @param string $fchildrens
 *
 * @return array
 */
function tree_to_array(& $node, $fchildrens = 'childrens')
{
    $ret = array();
    if (isset($node[$fchildrens]) && is_array($node[$fchildrens])) {
        foreach ($node[$fchildrens] as $child) {
            $ret = array_merge($ret, tree_to_array($child, $fchildrens));
        }
        unset($node[$fchildrens]);
        $ret[] = $node;
    } else {
        $ret[] = $node;
    }
    return $ret;
}

/**
 * 根据指定的键值对数组排序
 *
 * @param array $array 要排序的数组
 * @param string $keyname 键值名称
 * @param int $sortDirection 排序方向
 *
 * @return array
 */
function array_column_sort($array, $keyname, $sortDirection = SORT_ASC)
{
    return array_sortby_multifields($array, array($keyname => $sortDirection));
}

/**
 * 将一个二维数组按照指定列进行排序，类似 SQL 语句中的 ORDER BY
 *
 * @param array $rowset
 * @param array $args
 */
function array_sortby_multifields($rowset, $args)
{
    $sortArray = array();
    $sortRule = '';
    foreach ($args as $sortField => $sortDir) {
        foreach ($rowset as $offset => $row) {
            $sortArray[$sortField][$offset] = $row[$sortField];
        }
        $sortRule .= '$sortArray[\'' . $sortField . '\'], ' . $sortDir . ', ';
    }
    if (empty($sortArray) || empty($sortRule)) { return $rowset; }
    eval('array_multisort(' . $sortRule . '$rowset);');
    return $rowset;
}

/*
description: 交换数组中两个元素的位置，元素包括key和value，具体用法见下面的例子
$arr = array (11 => 'a', 22 => 'b', 33 => 'c', 44 => 'd' );
$res = array_exchange ( $arr, 11, 33 );
*/
function array_exchange($arr, $arg1, $arg2) {
	$r = range ( 0, count ( $arr ) - 1 );
	$res = $res_bak = array_combine ( $r, array_keys ( $arr ) );
	$change = array ($arg1, $arg2 );
	list ( $res [array_search ( $change [0], $res_bak )], $res [array_search ( $change [1], $res_bak )] ) = array ($change [1], $change [0] );
	foreach ( $res as $v ) {
		$array [$v] = $arr [$v];
	}
	return $array;
} 
/*
假设：给定一个大数组和一个字符串，要求在这个大数组中查找出比这个字符串大的5个元素。
对于一个小数组（如：几十个元素以下的数组），可以采用循环的办法来一个一个进行比较，但是对于大数组来说，这个方法显然是不行，这需要找一个快速查找定位的解决办法。
$search = 'arr';
$array = array (
	'abs',	
	'acos',
	'acosh',
	'addcslashes',
	'addslashes',
	'aggregate_info',
	'array_diff',
	'array_fill_keys',
	'array_fill',
	'array_filter',
	'base64_encode',
	'basename',
	'bcadd',
	'bccomp',
);
$arrpos = array_pos($array,$search);   //定位
$arr = array_slice($array,$arrpos,5);  //取出数组
print_r($arr);

快速查找的结果：
Array
(
    [0] => array_diff
    [1] => array_fill_keys
    [2] => array_fill
    [3] => array_filter
    [4] => base64_encode
)
*/
function array_pos($array,$search)
{
	if(empty($array)) return false;
	if(!$search) return 0;
	sort($array);
	$array_turn = array_flip($array);
	if(isset($array_turn[$search]))
	{
		$arrpos = $array_turn[$search];
	}
	else 
	{
		$tmp_arr = $array;
		$tmp_arr[] = $search;
		sort($tmp_arr);
		$tmp_arr_turn = array_flip($tmp_arr);
		$arrpos = $tmp_arr_turn[$search];
	}
	return $arrpos;
}

/**
 * 对数据进行编码转换
 * @param array/string $data       数组
 * @param string $input     需要转换的编码
 * @param string $output    转换后的编码
 */
function array_iconv($data, $input = 'gbk', $output = 'utf-8') {
	if (!is_array($data)) {
		return iconv($input, $output, $data);
	} else {
		foreach ($data as $key=>$val) {
			if(is_array($val)) {
				$data[$key] = array_iconv($val, $input, $output);
			} else {
				$data[$key] = iconv($input, $output, $val);
			}
		}
		return $data;
	}
}

/**
$str ="array (
  'workflowid' => '',
  'ishtml' => '0',
  'content_ishtml' => '0',
  'create_to_html_root' => '0',
)";
$setting = string2array($str);
$setting:
Array
(
    [workflowid] => 
    [ishtml] => 0
    [content_ishtml] => 0
    [create_to_html_root] => 0
)
**/

/**
 * 将字符串转换为数组
 *
 * @param	string	$data	字符串
 * @return	array	返回数组格式，如果，data为空，则返回空数组
 */
function string2array($data) {
	if($data == '') return array();
	eval("\$array = $data;");
	return $array;
}

/**
 * 返回经stripslashes处理过的字符串或数组
 * @param $string 需要处理的字符串或数组
 * @return mixed
 */
function new_stripslashes($string) {
	if(!is_array($string)) return stripslashes($string);
	foreach($string as $key => $val) $string[$key] = new_stripslashes($val);
	return $string;
}

/**
* 将数组转换为字符串
*
* @param	array	$data		数组
* @param	bool	$isformdata	如果为0，则不使用new_stripslashes处理，可选参数，默认为1
* @return	string	返回字符串，如果，data为空，则返回空
*/
function array2string($data, $isformdata = 1) {
	if($data == '') return '';
	if($isformdata) $data = new_stripslashes($data);
	return addslashes(var_export($data, TRUE));
}
/* 
 * 数组转换成对象
$array = array('name' => 'one',
               'sex' => 'two',
			   'test'=>array('a'=>'ss','dd'),
               'old' => 'three'
			  );
$arrayobject = array2Object($array);
echo $arrayobject->name;  // one
print_r(object2Array($arrayobject));  
 */
function array2Object($array)
{
	if(!is_array($array)) return $array;

	$object = new stdClass();
	if(is_array($array) && count($array) > 0)
	{
		foreach($array as $name=>$value)
		{
			$name = strtolower(trim($name));
			if($name) $object->$name = array2Object($value);
		}

		return $object;
	}
	else return FALSE;
} 

/* 
 * 对象转换成数组 
 */
function object2Array($objParam) {
	$obj_param = ( array ) $objParam;
	foreach ( $obj_param as $key => $value ) {
		if (is_object ( $value )) {
			object2Array ( $value );
			$obj_param [$key] = ( array ) $value;
		}
	}
	return $obj_param;
}

//数组开头添加元素 保持原始key不变 arrayUnshift($arr, array('test'=>'4'))
function arrayUnshift($arrParams, $arrAdd) {
	$arr_keys = array ();
	$arr_values = array ();
	$arr_add_keys = array_keys ( $arrAdd );
	$arr_keys = array ($arr_add_keys [0] );
	$arr_values = array ($arrAdd [$arr_add_keys [0]] );
	foreach ( $arrParams as $key => $value ) {
		array_push ( $arr_keys, $key );
		array_push ( $arr_values, $value );
	}
	$arr_result = array_combine ( $arr_keys, $arr_values );
	return $arr_result;
} 

//获取多维数组下特定键下的值，并生成一维数组 
function getKey2Array(array $arr, $key){
	if (!trim($key)) return false;
	preg_match_all("/\"$key\";\w{1}:(?:\d+:|)(.*?);/", serialize($arr), $output);
	return $output[1];
}

//多维数组转一维数组 $arr=array('123.html','456.html',array('dw.html','fl.html',array('ps.html','fw.html')),'ab.html');
function rebuild_array($arr){  //rebuild a array
	static $tmp=array();

	for($i=0; $i<count($arr); $i++){
		if(is_array($arr[$i])){
			rebuild_array($arr[$i]);
		}else{
			$tmp[]=$arr[$i];
		}
	}

	return $tmp;
}
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