PHP實戰
<?php 
  $array = array(); 
  $array["key"] = "values"; 
?> 

PHP實戰
<?php
  //array數組
  $users = array('phone','computer','dos','linux');
  echo $users;//只會打印出數據類型Array
  print_r($users);//Array ( [0] => phone [1] => computer [2] => dos [3] => linux )
  $numbers = range(1,5);//創建一個包括指定范圍的數組
  print_r($numbers);//Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )
  print_r(true);//1
  var_dump(false);//bool(false)
//print_r可以把字符串和數字簡單地打印出來,數組會以Array開頭并已鍵值形式表示,print_r輸出布爾值和null的結果沒有意義,因此用var_dump更合適
//通過循環來顯示數組里所有的值
  for($i = 0 ;$i < 5;$i++){
    echo $users[$i];
    echo '<br/>';
  }
//通過count/sizeof統計數組中單元數目或對象中的屬性個數
  for($i = 0; $i < count($users);$i++){
    echo $users[$i];
    echo '<br/>';
  }
//還可以通過foreach循環來遍歷數組,這種好處在于不需要考慮key
  foreach($users as $value){
    echo $value.'<br/>';//點號為字符串連接符號
  }
//foreach循環遍歷 $key => $value；$key和$value是變量名,可以自行設置
  foreach($users as $key => $value){
    echo $key.'<br/>';//輸出鍵
  }
?>

PHP實戰
<?php
  //創立自定義鍵的數組
  $ceo = array('apple'=>'jobs','microsoft'=>'Nadella','Larry Page','Eric');
  //如果不去聲明元素的key,它會從零開始
  print_r($ceo);//Array ( [apple] => jobs [microsoft] => Nadella [0] => Larry Page [1] => Eric )
  echo $ceo['apple'];//jobs
   //php5.4起的用法
  $array = [
    "foo" => "bar",
    "bar" => "foo",
  ];
  print_r($array);//Array ( [foo] => bar [bar] => foo ) 
?>  

PHP實戰
<?php
  //通過為數組元素賦值來創建數組
  $ages['trigkit4'] = 22;
  echo $ages.'<br/>';//Array
  //因為相關數組的索引不是數字,所以無法通過for循環來進行遍歷操作,只能通過foreach循環或list()和each()結構
  //each的使用
  //each返回數組中當前的鍵/值對并將數組指針向前移動一步
  $users = array('trigkit4'=>22,'mike'=>20,'john'=>30);
  //print_r(each($users));//Array ( [1] => 22 [value] => 22 [0] => trigkit4 [key] => trigkit4 )
  //相當于：$a = array([0]=>trigkit4,[1]=>22,[value]=>22,[key]=>trigkit4);
  $a = each($users);//each把本來的數組的第一個元素拿出來包裝成新數組后賦值給$a
  echo $a[0];//trigkit4
  //!!表示將真實存在的數據轉換成布爾值
  echo !!each($users);//1
?> 

PHP實戰
<?php
  $a = ['2','abc','def'];
  list($var1,$var2) = $a;
  echo $var1.'<br/>';//2
  echo $var2;//abc
  $a = ['name'=>'trigkit4','age'=>22,'0'=>'boy'];
  //list只熟悉key為數字的索引
  list($var1,$var2) = $a;
  echo $var1;//boy
?>

PHP實戰
<?php
  $numbers = array('100','2');
  sort($numbers,SORT_STRING);//按字符串排序,字符串只比較第一位大小
  print_r($numbers);//Array ( [0] => 100 [1] => 2 )
  $arr = array('trigkit4','banner','10');
  sort($arr,SORT_STRING);
  print_r($arr);//Array ( [0] => 10 [1] => banner [2] => trigkit4 )
  shuffle($arr);
  print_r($arr);//隨機排序
  $array = array('a','b','c','d','0','1');
  array_reverse($array);
  print_r($array);//原數組的反向排序. Array ( [0] => a [1] => b [2] => c [3] => d [4] => 0 [5] => 1 )
  //數組的拷貝
  $arr1 = array( '10' , 2);
  $arr2 = &$arr1 ;
  $arr2 [] = 4 ; // $arr2 被改變了,$arr1仍然是array('10', 3)
  print_r($arr2);//Array ( [0] => 10 [1] => 2 [2] => 4 )
  //asort的使用
  $arr3 = & $arr1 ;//現在arr1和arr3是一樣的
  $arr3 [] = '3' ;
  asort($arr3);//對數組進行排序并保存原始關系
  print_r($arr3);// Array ( [1] => 2 [2] => 3 [0] => 10 )
  //ksort的使用
  $fruits = array('c'=>'banana','a'=>'apple','d'=>'orange');
  ksort($fruits);
  print_r($fruits);//Array ( [a] => apple [c] => banana [d] => orange )
  //unshift的使用
  array_unshift($array,'z');//開頭處添加一元素
  print_r($array);//Array ( [0] => z [1] => a [2] => b [3] => c [4] => d [5] => 0 [6] => 1 ) 
  //current(pos)的使用
  echo current($array);//z;獲取當前數組中的當前單元
  //next的使用
  echo next($array);//a;將數組中的內部指針向前移動一位
  //reset的使用
  echo reset($array);//z;將數組內部指針指向第一個單元
  //prev的使用
  echo next($array);//a;
  echo prev($array);//z;倒回一位
  //sizeof的使用
  echo sizeof($array);//7；統計數組元素的個數
  //array_count_values
  $num = array(10,20,30,10,20,1,0,10);//統計數組元素出現的次數
  print_r(array_count_values($num));//Array ( [10] => 3 [20] => 2 [30] => 1 [1] => 1 [0] => 1 ) 
?>  

PHP實戰
<必修php
  $value = range(0,120,10);
  for($i=0;$i<count($value);$i++){
    print_r($value[$i].' ');//0 10 20 30 40 50 60 70 80 90 100 110 120 
  }
必修>

PHP實戰
<?php
  //array_pad函數,數組數組首尾選擇性追加
  $num = array(1=>10,2=>20,3=>30);
  $num = array_pad($num,4,40);
  print_r($num);//Array ( [0] => 10 [1] => 20 [2] => 30 [3] => 40 )
  $num = array_pad($num,-5,50);//array_pad(array,size,value)
  print_r($num);//Array ( [0] => 50 [1] => 10 [2] => 20 [3] => 30 [4] => 40 ) 
?>

PHP實戰
 <必修php
  //unset()的使用
  $num = array_fill(0,5,rand(1,10));//rand(min,max)
  print_r($num);//Array ( [0] => 8 [1] => 8 [2] => 8 [3] => 8 [4] => 8 ) 
  echo '<br/>';
  unset($num[3]);
  print_r($num);//Array ( [0] => 8 [1] => 8 [2] => 8 [4] => 8 ) 
必修>

PHP實戰
<必修php
  //array_fill()的使用
  $num = range('a','e');
  $arrayFilled = array_fill(1,2,$num);//array_fill(start,number,value)
  echo '<pre>';
  print_r($arrayFilled);
必修>

PHP實戰
<?PHP
  $number = array(1,2,3,4,5);
  $array = array("I","Am","A","PHP","er");
  $newArray = array_combine($number,$array);
  print_r($newArray);//Array ( [1] => I [2] => Am [3] => A [4] => PHP [5] => er ) 
?> 

PHP實戰
<?php
  $color = array("red", "green", "blue", "yellow");
  count ($color); //獲得4
  array_splice($color,1,1); //刪除第二個元素
  print_r(count ($color)); //3
  echo $color[2]; //yellow
  echo $color[1]; //blue
?> 

PHP實戰
<?php
  $color=array("red", "green", "blue", "yellow","blue","green");
  $result = array_unique($color);
  print_r($result);//Array ( [0] => red [1] => green [2] => blue [3] => yellow ) 
?> 

PHP實戰
<?PHP
  $array = array("red","blue","red","Black");
  print_r($array);
  echo "<br />";
  $array = array_flip($array);//
  print_r($array);//Array ( [red] => 2 [blue] => 1 [Black] => 3 ) 
?> 

PHP實戰
<meta charset="utf-8">
<必修php
  $array = array("red","blue","red","Black");
  $result=array_search("red",$array)//array_search(value,array,strict)
  if(($result === NULL)){
    echo "不存在數值red";
  }else{
    echo "存在數值 $result";//存在數值 0 
  }
必修>