Array Manipulation Classes _php tutorial

     Removeempty (&,=(  =((:: Removeempty ([=((== ''([([] =1, ' value ' = ' 1-1 '), * array (' id ' = + 2, ' value ' = ' 2-1 '), *); * $values = Arrayhelper::getcols ($rows, ' value '); * * Dump ($values); *//output result is *//Array (*//' 1-1 ', *//' 2-1 ', *//) * @endcode * * @param array $arr Data source * @param string $col the key to query * * @return array containing all values for the specified key  Getcols (,=(  (([[] =[ 1, ' value ' = ' 1-1 '), * array (' id ' = + 2, ' value ' = ' 2-1 '), *); * $hashmap = Arrayhelper::tohashmap ($rows, ' id ', ' value '); * * Dump ($HASHMAP); *//output result is *//Array (*///1 = ' 1-1 ', *//2 = ' 2-1 ', *//) * @endcode * * If you omit $valueField parameter, the result of the conversion is each item containing all the data The array. * Usage 2: * @code php * $rows = Array (* Array (' id ' = + 1, ' value ' = ' 1-1 '), * array (' id ' = 2, ' value ' = ' 2-1 '), * ); * $hashmap = Arrayhelper::tohashmap ($rows, ' id '); * * Dump ($HASHMAP); *//output result is *//Array (*//1 = = Array (' id ' = = 1, ' value ' = ' 1-1 '), *//2 = = Array (' id ' = = 2, ' value ' =&G T ' 2-1 '), *//) * @endcode * * @param array $arr Data source * @param string $keyField Convert by what key value * @param string $valueField corresponding key Value * * @return array of HashMap style after array conversion  Tohashmap (,,==((  [[]] =[(  [[]] =  1, ' value ' = ' 1-1 ', ' parent ' = + 1), * Array (' id ' = + 2, ' value ' = ' 2-1 ', ' parent ' = 1), * Array (' ID ' =&G T 3, ' value ' = ' 3-1 ', ' parent ' = + 1), * Array (' id ' = + 4, ' value ' = ' 4-1 ', ' parent ' = 2), * Array (' ID ' =&gt ; 5, ' value ' = ' 5-1 ', ' parent ' = 2), * Array (' id ' = + 6, ' value ' = ' 6-1 ', ' parent ' = 3), *); * $values = Arrayhelper::groupby ($rows, ' parent '); * * Dump ($values); *//According to the output of the parent group is *//Array (*///1 = Array (*//Array (' id ' = = 1, ' value ' = ' 1-1 ', ' parent ' = 1), * Array (' id ' = = 2, ' value ' = ' 2-1 ', ' parent ' = 1), *//Array (' id ' = + 3, ' value ' = ' 3-1 ', ' Parent ' =&G T 1), *//), *//2 = Array (*//Array (' id ' = + 4, ' value ' = ' 4-1 ', ' parent ' = 2), *//Array (' id ' = = 5, ' Value ' = ' 5-1 ', ' Parent ' and ' 2 ', *//), *//3 = Array (*//Array (' id ' = + 6, ' value ' = ' 6-1 ', ' parent ') = 3), *//), *//) * @endcode * * @param array $arr Data source * @param string $Keyfield The result of grouping by the key name * * @return Array   GroupBy (,=(  =[[][] =  1, ' value ' = ' 1-1 ', ' parent ' = + 0), * Array (' id ' = + 2, ' value ' = ' 2-1 ', ' parent ' = 0), * Array (' ID ' =&G T 3, ' value ' = ' 3-1 ', ' parent ' = + 0), * * Array (' id ' = 7, ' value ' = ' 2-1-1 ', ' parent ' = 2), * Array (' ID ') + 8, ' value ' = ' 2-1-2 ', ' parent ' = 2), * Array (' id ' = + 9, ' value ' = ' 3-1-1 ', ' parent ' = 3), * array (' id ' = +, ' value ' = ' 3-1-1-1 ', ' parent ' = 9), *); * * $tree = Arrayhelper::tree ($rows, ' id ', ' parent ', ' nodes '); * * Dump ($tree); *//output: *//Array (*//Array (' id ' = 1, ..., ' nodes ' = = Array ()), *//Array (' id ' = = 2, ..., ' nodes ' = =) Array (*//Array (..., ' parent ' = = 2, ' nodes ' = = Array ()), *//Array (..., ' parent ' = 2, ' nodes ' = = Array ()), *//), *//Array (' id ' = 3, ..., ' nodes ' = = Array (*//Array (' id ' = = 9, ..., ' parent ' = 3, ' nodes ' = Array (*//Array (...), ' parent ' = 9, ' nodes ' = ' = ' Array (), *//), *//) * @endcode * * If you want to obtain a subtree of any node root, you canTo use $refs parameters: * @code php * $refs = null; * $tree = Arrayhelper::tree ($rows, ' id ', ' parent ', ' nodes ', $refs); *//Output ID 3 node and all child nodes * $id = 3; * Dump ($refs [$id]); * @endcode * * @param array $arr Data source * @param string $keyNodeId Node ID field name * @param string $keyParentId node parent ID field name * @param str ing $keyChildrens Save the field name of the child node * @param boolean $refs whether to include the node reference in the returned result * * Return array of the array tree structure  Totree (,,= ' parent_id ',= ' Childrens ', &==(  =[][] =[[]] =&[=(  ==[((!([[] =&[=&[[[] =&[[] =&[   Treetoarray (,= ' Childrens '=(([]) &&([([] =(, Self::treetoarray (,([[] =[] = 1, ' value ' = ' 1-1 ', ' parent ' = + 1), * Array (' id ' = + 2, ' value ' = ' 2-1 ', ' parent ' = 1), * Array (' ID ' =&gt ; 3, ' value ' = ' 3-1 ', ' parent ' = + 1), * Array (' id ' = + 4, ' value ' = ' 4-1 ', ' parent ' = 2), * Array (' ID ' =&gt ; 5, ' value ' = ' 5-1 ', ' parent ' = 2), * Array (' id ' = + 6, ' value ' = ' 6-1 ', ' parent ' = 3), *); * * $rows = Arrayhelper::sortbycol ($rows, ' id ', SORT_DESC); * Dump ($rows); *//Output Result: *//Array (*//Array (' id ' = = 6, ' value ' = ' 6-1 ', ' parent ' = 3), *//Array (' id ' = 5, ' value ') = ' 5-1 ', ' parent ' = 2), *//Array (' id ' = + 4, ' value ' = ' 4-1 ', ' parent ' = 2), *//Array (' id ' = 3, ' Value ' = ' 3-1 ', ' parent ' = 1), *//Array (' id ' = = 2, ' value ' = ' 2-1 ', ' parent ' = 1), *//Array (' id ' = > 1, ' value ' = ' 1-1 ', ' parent ' = 1), *//) * @endcode * * @param array $array the array to sort * @param string $keyname Sorted key * @param int $dir Sort Direction * * @return Array sorted  Sortbycol (,,=Self::sortbymulticols (,(=SORT_ASC, * ' name ' = + sort_desc, *)); * @endcode * * @param array $rowset to sort by * @param array $args sorted by key * * @return array sorted  Sortbymulticols (,== ''(  =(  =[][] =[. = ' $sortArray [\ '.. 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