数组搜索的时候如何样才能不区分大小写呢
数组搜索的时候怎么样才能不区分大小写呢?
为什么下面2个都搜不到啊,我看了手册说加个false可以的,为什么还不行?
- PHP code
<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--><?php $dr=array('cc','Dd','Ee');if(in_array("dd",$dr,false)){ echo "aa";}if(array_search("dd",$dr,false)){ echo "aa";}?>
------解决方案--------------------
如果 needle 是字符串,则比较是区分大小写的。
如果第三个参数 strict 的值为 TRUE 则 in_array() 函数还会检查 needle 的类型是否和 haystack 中的相同。
------解决方案--------------------
in_array
可选。如果设置该参数为 true,则检查搜索的数据与数组的值的类型是否相同。
值的类型是否相同 不是区分大小写
array_search
如果第三个参数 strict 被指定为 true,则只有在数据类型和值都一致时才返回相应元素的键名。
也是类型和值,并没有说到区分大小写的事情.
按照你的需求
1.遍历 使用字符串比较函数
2.正则
3.全部转换成小写后比较
....
------解决方案--------------------
第三个参数是判断类型的,也就是用===,而不是==。。
封个函数遍历一下行了.
------解决方案--------------------
麻烦你自己看php.net,这种基础问题你将来遇见成百上千个,你都来问吗
------解决方案--------------------
------解决方案--------------------
自己写一个就是了
- PHP code
$dr = array('cc','Dd','Ee');if(in_iarray("dd",$dr,false)){ echo "aa";}function in_iarray($needle, $haystack, $strict=false) { if(! is_string($needle)) return in_array($needle, $haystack, $strict); return in_array(strtolower($needle), array_map('strtolower', $haystack));}<div class="clear"> </div>

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



Title: Example of using the Array.Sort function to sort an array in C# Text: In C#, array is a commonly used data structure, and it is often necessary to sort the array. C# provides the Array class, which has the Sort method to conveniently sort arrays. This article will demonstrate how to use the Array.Sort function in C# to sort an array and provide specific code examples. First, we need to understand the basic usage of the Array.Sort function. Array.So

php提交表单通过后,弹出的对话框怎样在当前页弹出php提交表单通过后,弹出的对话框怎样在当前页弹出而不是在空白页弹出?想实现这样的效果:而不是空白页弹出:------解决方案--------------------如果你的验证用PHP在后端,那么就用Ajax;仅供参考:HTML code

In PHP, there are many powerful array functions that can make array operations more convenient and faster. When we need to combine two arrays into an associative array, we can use PHP's array_combine function to achieve this operation. This function is actually used to combine the keys of one array as the values of another array into a new associative array. Next, we will explain how to use the array_combine function in PHP to combine two arrays into an associative array. Learn about array_comb

When programming in PHP, we often need to merge arrays. PHP provides the array_merge() function to complete array merging, but when the same key exists in the array, this function will overwrite the original value. In order to solve this problem, PHP also provides an array_merge_recursive() function in the language, which can merge arrays and retain the values of the same keys, making the program design more flexible. array_merge

In PHP programming, array is a very important data structure that can handle large amounts of data easily. PHP provides many array-related functions, array_fill() is one of them. This article will introduce in detail the usage of the array_fill() function, as well as some tips in practical applications. 1. Overview of the array_fill() function The function of the array_fill() function is to create an array of a specified length and composed of the same values. Specifically, the syntax of this function is

In PHP programming, array is a frequently used data type. There are also quite a few array operation functions, including the array_change_key_case() function. This function can convert the case of key names in the array to facilitate our data processing. This article will introduce how to use the array_change_key_case() function in PHP. 1. Function syntax and parameters array_change_ke

The array module in Python is a predefined array, so it takes up much less space in memory than a standard list, and can also perform fast element-level operations such as adding, deleting, indexing, and slicing. In addition, all elements in the array are of the same type, so you can use the efficient numerical operation functions provided by the array, such as calculating the average, maximum, and minimum values. In addition, the array module also supports writing and reading array objects directly into binary files, which makes it more efficient when processing large amounts of numerical data. Therefore, if you need to process a large amount of homogeneous data, you may consider using Python's array module to optimize the execution efficiency of your code. To use the array module, you first need to

In Java development, we often use arrays to store a series of data because of the convenience and performance advantages of arrays. However, in the process of using arrays, some exceptions will occur, and one of the common exceptions is ArrayStoreException. This exception is thrown when we store incompatible data types in the array. This article will introduce what an ArrayStoreException is, why it occurs, and how to solve it. 1. Arr
