确定变量具有最高值和最低值

Question

例如，如果我有：

$person1 = "10"; 
$person2 = "-"; 
$person3 = "5"; 

我需要确定的最高数量的人，并用“W”前面加上他们的字符串，并确定与人最低的（数字）数量，并在前面加上他们的字符串以“L”

我试图输出：

$person1 = "W10"; 
$person2 = "-"; 
$person3 = "L5"; 

Answer 1

$persons = array(10, '-', '12', 34) ; //array of persons, you define this 
$max_index = array_search($max = max($persons), $persons); 
$min_index = array_search($min = min($persons), $persons); 
$persons[$max_index] = 'W' . $persons[$max_index]; 
$persons[$min_index] = 'L' . $persons[$min_index]; 

print_r($persons); 

希望有所帮助。它应该给你提示使用哪些函数。和平Danuel

解决方案2

foreach((array)$persons as $index=>$value){ 
     if(!is_numeric($value))continue; 
     if(!isset($max_value)){ 
       $max_value = $value; 
       $max_index = $index; 
     } 
     if(!isset($min_value)){ 
       $min_value = $value; 
       $min_index = $index; 
     } 
     if($max_value < $value){ 
       $max_value = $value; 
       $max_index = $index; 
     } 
     if($min_value > $value){ 
       $min_value = $value; 
       $min_index = $index; 
     } 
} 

@$persons[$max_index] = 'W'.$persons[$max_index];//@suppress some errors just in case 
@$persons[$min_index] = 'L'.$persons[$min_index]; 

print_r($persons); 

Answer 2

我会把每一个变量到一个数组，然后使用数组等等rt功能。

$people = array (
    'person1' => $person1, 
    'person2' => $person2, 
    'person3' => $person3 
); 

asort($people); 

$f = key($people); 

end($people); 
$l = key($people); 

$people[$f] = 'L' . $people[$f]; 
$people[$l] = 'W' . $people[$l]; 

人1的比分然后可以通过使用$people_sorted['person1']

Answer 3

下面是引用是一个可行的解决方案，将与任何工作人组合：

$people = array (
    'person1' => 4, 
    'person2' => 10, 
    'person3' => 0 
); 

arsort($people); // Sort the array in reverse order 

$first = key($people); // Get the first key in the array 

end($people); 
$last = key($people); // Get the last key in the array 

$people[ $first ] = 'W' . $people[ $first ]; 
$people[ $last ] = 'L' . $people[ $last ]; 

var_dump($people); 

输出：

array(3) { 
["person2"]=> 
    string(3) "W10" 
    ["person1"]=> 
    int(4) 
    ["person3"]=> 
    string(2) "L0" 
}