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PHP合并兩個數(shù)組的兩種方式的異同

時間:2025-02-28 20:02:56 php語言 我要投稿
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PHP合并兩個數(shù)組的兩種方式的異同

  對數(shù)組的array_merge函數(shù)和+運算符比較迷惑,寫了個小程序比較下發(fā)現(xiàn)了他們的不同,就跟隨百分網(wǎng)小編一起去了解下吧,想了解更多相關(guān)信息請持續(xù)關(guān)注我們應(yīng)屆畢業(yè)生考試網(wǎng)!

  特別是+運算符,他的意思是,將右邊的數(shù)組單元(去重復(fù))追加到左邊數(shù)組的后面。

  復(fù)制代碼 代碼如下:

  <?php

  echo "\r\n第一種情況\r\n";

  $a=array(1,2,3,4,5,6);

  $b=array(7,8,9);

  $c=array_merge ($a,$b);

  print_r($c);

  $c=$a+$b;

  print_r($c);

  $c=$b+$a;

  print_r($c);

  echo "\r\n第二種情況\r\n";

  $a=array('a','b','c','d','e','f');

  $b=array('a','x','y');

  $c=array_merge ($a,$b);

  print_r($c);

  $c=$a+$b;

  print_r($c);

  $c=$b+$a;

  print_r($c);

  echo "\r\n第三種情況\r\n";

  $a=array(

  1=>'a',

  2=>'b',

  3=>'c',

  4=>'d',

  5=>'e',

  6=>'f');

  $b=array(

  1=>'a',

  7=>'x',

  8=>'y');

  $c=array_merge ($a,$b);

  print_r($c);

  $c=$a+$b;

  print_r($c);

  $c=$b+$a;

  print_r($c);

  ?>

  結(jié)果如下:

  復(fù)制代碼 代碼如下:

  第一種情況

  Array

  (

  [0] => 1

  [1] => 2

  [2] => 3

  [3] => 4

  [4] => 5

  [5] => 6

  [6] => 7

  [7] => 8

  [8] => 9

  )

  Array

  (

  [0] => 1

  [1] => 2

  [2] => 3

  [3] => 4

  [4] => 5

  [5] => 6

  )

  Array

  (

  [0] => 7

  [1] => 8

  [2] => 9

  [3] => 4

  [4] => 5

  [5] => 6

  )

  第二種情況

  Array

  (

  [0] => a

  [1] => b

  [2] => c

  [3] => d

  [4] => e

  [5] => f

  [6] => a

  [7] => x

  [8] => y

  )

  Array

  (

  [0] => a

  [1] => b

  [2] => c

  [3] => d

  [4] => e

  [5] => f

  )

  Array

  (

  [0] => a

  [1] => x

  [2] => y

  [3] => d

  [4] => e

  [5] => f

  )

  第三種情況

  Array

  (

  [0] => a

  [1] => b

  [2] => c

  [3] => d

  [4] => e

  [5] => f

  [6] => a

  [7] => x

  [8] => y

  )

  Array

  (

  [1] => a

  [2] => b

  [3] => c

  [4] => d

  [5] => e

  [6] => f

  [7] => x

  [8] => y

  )

  Array

  (

  [1] => a

  [7] => x

  [8] => y

  [2] => b

  [3] => c

  [4] => d

  [5] => e

  [6] => f

  )

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