简体中文(ZH-CN) English(EN) 繁体中文(ZH-TW)
Home > Backend Development > PHP Tutorial > body text

php删除数组元素的二种方法 unset,array_splice用法区别

WBOY
Release： 2016-07-25 08:52:56
Original
1101 people have browsed it
  2. $arr = array('a','b','c','d');
  3. unset($arr[1]);
  4. print_r($arr);
  5. ?>
复制代码

结果： Array ( [0] => a [2] => c [3] => d ) 如何做到缺少的元素会被填补并且数组会被重新索引？ 答案是array_splice()：

例子：

  2. $arr = array('a','b','c','d');
  3. array_splice($arr,1,1);
  4. print_r($arr);
  5. ?>
复制代码

结果： Array ( [0] => a [1] => c [2] => d ) 删除数组中特定元素（bbs.it-home.org 脚本学堂）：

  2. $arr2 = array(1,3, 5,7,8);
  3. foreach ($arr2 as $key=>$value)
  4. {
  5. if ($value === 3)
  6. unset($arr2[$key]);
  7. }
  8. var_dump($arr2);
  9. ?>
复制代码

删除空数组：

  2. $array = ('a' => "abc", 'b' => "bcd",'c' =>"cde",'d' =>"def",'e'=>"");
  3. array_filter($array);
  4. echo "
    ";
    Copy after login
  5. print_r($array);
  6. ?>
复制代码

结果： Array ( [a] => abc => bcd [c] => cde [d] => def )

总结： array_splice()函数删除的话，数组的索引值也变化了。 unset()函数删除的话，数组的索引值没有变化。



Related labels：
php删除数组元素的二种方法 unset array_splice用法区别
source：php.cn
Previous article：胸怀大海，敢想敢做 Next article：php实现图片压缩的二个例子
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
Vue.js still updates props even though i is a method variable I have the following method to compare two arrays, one from props and the other from my co...
From 2023-09-15 23:36:37
0
1
336
Create a function that alternates between .pop() and .shift() I'm having beginner's difficulty with my JS exercises. I need to write a function popAndSh...
From 2023-09-11 21:30:34
0
1
175
How to delete specific elements from an array How do I remove an element from an array when I know the element's value? For example: I h...
From 2023-08-20 16:20:23
0
2
278
What is the return value after pop() push() unshift() shift() operates on an array in Javascript? Recently I was reading "The Definitive Guide to JavaScript (6th Edition)", trans...
From 2017-06-12 09:25:04
0
2
1248
解决iOS 如何在一个数组A中删除另一个包含A数组元素一个数组B？ [self.arry removeObjectsInArray:self.deleteArr]; 有什么方法可以替换这个，根据地址删除数组元素的？这个方法貌似是根据元素内容来删除的...
From 2017-04-18 09:23:30
0
0
226
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn：Public welfare online PHP training，Help PHP learners grow quickly！