定义和用法
array_map() 函数返回用户自定义函数作用后的数组。回调函数接受的参数数目应该和传递给 array_map() 函数的数组数目一致。
语法
array_map(function,array1,array2,array3...)
参数 描述
function 必需。用户自定义函数的名称，或者是 null。
array1 必需。规定数组。
array2 可选。规定数组。
array3 可选。规定数组。
例子:
function cube($n)
{
$cb = $n*$n*$n;
return $cb;
}
$a = array(1, 2, 3, 4, 5);
$b = array_map("cube", $a);
echo '计算原数组各元素的立方，结果如下：';
echo '
';
echo '
';<br>
<br>
print_r($b);<br>
?><br>
<br>
<strong>输出：</strong><br>
计算原数组各元素的立方，结果如下：<br>
Array<br>
(<br>
[0] => 1<br>
[1] => 8<br>
[2] => 27<br>
[3] => 64<br>
[4] => 125<br>
)
<p style="width:100%;text-align:center;margin:10px 0">
<br>
<br>
</p><p style="width:100%;text-align:center;margin:10px 0">
</p><p class="clear"></p>
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
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),
SublimeText3 Linux new version
SublimeText3 Linux latest version
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
