Examples of custom array sorting functions and sorting classes implemented by PHP

In this paper, we describe the custom array sorting functions and sorting classes implemented by PHP. Share to everyone for your reference, as follows:

/** two-dimensional array custom sort function * Uasort ($arr, function_name) ***/$arr = Array ('  a ' =>1, ' b ' + = ' C '),  array (' a ' =>4 , ' b ' = ' a '), array (' A '  =>5, ' b ' = ' g '),  array (' A ' =>7, ' b ' = ' f '),  array (' A ' =>6, ' b ' = > ' e ')), function Compare_arr ($x, $y) {  if ($x [' B ']< $y [' B ']) {    return-1;  } else if ($x [' B ']> $y [' B ']) {    return 1;  } else{    return 0;}  } Uasort ($arr, ' Compare_arr '); foreach ($arr as $a) {  echo $a [' a ']. ' = '. $a [' B ']. ' <br/> ';}

Custom sorting classes in the manual:

Class multisort{   var $key;  The key in your array   //Sort function parameter is the array to be sorted by the index sort type   function run ($myarray, $key _to_sort, $type _of_sort = ")   {
  
    $this->key = $key _to_sort;     if ($type _of_sort = = ' desc ')       uasort ($myarray, Array ($this, ' myreverse_compare '));     else       Uasort ($myarray, Array ($this, ' mycompare '));     return $myarray;   }   Positive order   function Mycompare ($x, $y)   {     if ($x [$this->key] = = $y [$this->key])       return 0;     else if ($x [$this->key] < $y [$this->key])       return-1;     else       return 1;   }   Reverse   function Myreverse_compare ($x, $y)   {     if ($x [$this->key] = = $y [$this->key])       return 0;< C27/>else if ($x [$this->key] > $y [$this->key])       return-1;     else       return 1;}   }
  

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