Arrays

admin

1. <?php
   
2. $cars = array("Volvo", "BMW", "Toyota");
   
3. echo count($cars);
   
4. ?>

複製代碼

結果: 3

admin

1. <?php
   
2. $cars = array("Volvo", "BMW", "Toyota");
   
3. echo "I like " . $cars[0] . ", " . $cars[1] . " and " . $cars[2] . ".";
   
4. ?>

複製代碼

結果: I like Volvo, BMW and Toyota.

admin

1. <?php
   
2. $cars = array("Volvo", "BMW", "Toyota");
   
3. $arrlength = count($cars);
   
4. 
   
5. for($x = 0; $x < $arrlength; $x++) {
   
6.   echo $cars[$x];
   
7.   echo "<br>";
   
8. }
   
9. ?>

複製代碼

結果:
Volvo
BMW
Toyota

admin

1. $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");

複製代碼

和

1. $age['Peter'] = "35";
   
2. $age['Ben'] = "37";
   
3. $age['Joe'] = "43";

複製代碼

意思一樣。

admin

1. <?php
   
2. $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
   
3. 
   
4. foreach($age as $x => $x_value) {
   
5.   echo "Key=" . $x . ", Value=" . $x_value;
   
6.   echo "<br>";
   
7. }
   
8. ?>

複製代碼

結果:
Key=Peter, Value=35
Key=Ben, Value=37
Key=Joe, Value=43

admin

Multidimensional Arrays

1. <?php
   
2. $cars = array (
   
3.   array("Volvo",22,18),
   
4.   array("BMW",15,13),
   
5.   array("Saab",5,2),
   
6.   array("Land Rover",17,15)
   
7. );
   
8.   
   
9. echo $cars[0][0].": In stock: ".$cars[0][1].", sold: ".$cars[0][2].".<br>";
   
10. echo $cars[1][0].": In stock: ".$cars[1][1].", sold: ".$cars[1][2].".<br>";
    
11. echo $cars[2][0].": In stock: ".$cars[2][1].", sold: ".$cars[2][2].".<br>";
    
12. echo $cars[3][0].": In stock: ".$cars[3][1].", sold: ".$cars[3][2].".<br>";
    
13. ?>

複製代碼

結果:
Volvo: In stock: 22, sold: 18.
BMW: In stock: 15, sold: 13.
Saab: In stock: 5, sold: 2.
Land Rover: In stock: 17, sold: 15.

admin

1. <?php
   
2. $cars = array("Volvo", "BMW", "Toyota");
   
3. sort($cars);
   
4. ?>

複製代碼

排序

admin

PHP array sort functions:

• sort() - sort arrays in ascending order
• rsort() - sort arrays in descending order
• asort() - sort associative arrays in ascending order, according to the value
• ksort() - sort associative arrays in ascending order, according to the key
• arsort() - sort associative arrays in descending order, according to the value
• krsort() - sort associative arrays in descending order, according to the key
  

admin

1. <?php
   
2. $age = array("Peter"=>"35", "Ben"=>"37", "Joe"=>"43");
   
3. arsort($age);
   
4. ?>

複製代碼

sort associative arrays in descending order, according to the value