<?php$arr = [['name'=>'dee','age'=>28],['name'=>'emperor', 'age'=>30],['name'=>'Lee', 'age'=>32],['name'=>'Arshavin', 'age'=>33],['name'=>'Totti', 'age'=>40]
];$arr2 = [['name'=>'Ozil', 'age'=>27],['name'=>'CR7', 'age'=>29],['name'=>'Doctor', 'age'=>33],['name'=>'John', 'age'=>35]
];function multi_array_sort($multi_array, $sort_key, $sort = SORT_DESC) {if (is_array($multi_array)) {foreach ($multi_array as $row_array) {if (is_array($row_array)) {$key_array[] = $row_array[$sort_key];} else {return FALSE;}}} else {return FALSE;}array_multisort($key_array, $sort, $multi_array);return $multi_array;
}$arr = array_merge($arr, $arr2);
$arr = multi_array_sort($arr, 'age', SORT_ASC);echo '<pre>';
print_r($arr);

bool array_multisort ( array &$arr [, mixed $arg = SORT_ASC [, mixed $arg = SORT_REGULAR [, mixed $... ]]] )

<?php$arr = [['name'=>'dee','age'=>28],['name'=>'emperor', 'age'=>30],['name'=>'Lee', 'age'=>32],['name'=>'Arshavin', 'age'=>33],['name'=>'Totti', 'age'=>40]
];$arr2 = [['name'=>'Ozil', 'age'=>27],['name'=>'CR7', 'age'=>29],['name'=>'Doctor', 'age'=>33],['name'=>'John', 'age'=>35]
];function array_sort($arr, $keys, $type = 'asc') {$keysvalue = $new_array = array();foreach ($arr as $k => $v) {$keysvalue[$k] = $v[$keys];}if ($type == 'asc') {asort($keysvalue);} else {arsort($keysvalue);}reset($keysvalue);foreach ($keysvalue as $k => $v) {$new_array[] = $arr[$k];}return $new_array;
}$arr = array_merge($arr, $arr2);
$arr = array_sort($arr, 'age');echo '<pre>';
print_r($arr);

<?php$arr = [['name'=>'dee','age'=>28],['name'=>'emperor', 'age'=>30],['name'=>'Lee', 'age'=>32],['name'=>'Arshavin', 'age'=>33],['name'=>'Totti', 'age'=>40]
];$arr2 = [['name'=>'Ozil', 'age'=>27],['name'=>'CR7', 'age'=>29],['name'=>'Doctor', 'age'=>33],['name'=>'John', 'age'=>35]
];function array_sort($array,$keys,$type='asc'){if(!isset($array) || !is_array($array) || empty($array)){return '';}if(!isset($keys) || trim($keys)==''){return '';}if(!isset($type) || $type=='' || !in_array(strtolower($type),array('asc','desc'))){return '';}$keysvalue=array();foreach($array as $key=>$val){$keysvalue[] =$val[$keys];}asort($keysvalue); //key值排序reset($keysvalue); //指针重新指向数组第一个foreach($keysvalue as $key=>$vals) {$keysort[] = $key;}$keysvalue = array();$count=count($keysort);if(strtolower($type) != 'asc'){for($i=$count-1; $i>=0; $i--) {$keysvalue[] = $array[$keysort[$i]];}}else{for($i=0; $i<$count; $i++){$keysvalue[] = $array[$keysort[$i]];}}return $keysvalue;
}$arr = array_merge($arr, $arr2);
$arr = array_sort($arr, 'age');echo '<pre>';
print_r($arr);