php数组工具类
PHP二维数组去重复项函数
<?phpfunction 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>";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") );*/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);$setting:Array( [workflowid] => [ishtml] => 0 [content_ishtml] => 0 [create_to_html_root] => 0)**//** * 将字符串转换为数组 * * @paramstring$data字符串 * @returnarray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 $string;}/*** 将数组转换为字符串** @paramarray$data数组* @parambool$isformdata如果为0，则不使用new_stripslashes处理，可选参数，默认为1* @returnstring返回字符串，如果，data为空，则返回空*/function array2string($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 $arrayobject->name; // oneprint_r(object2Array($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 arraystatic $tmp=array();for($i=0; $i<count($arr); $i++){if(is_array($arr[$i])){rebuild_array($arr[$i]);}else{$tmp[]=$arr[$i];}}return $tmp;}