大约有 20,000 项符合查询结果（耗时：0.0269秒） [XML]
Check if $_POST exists
...ugustus Francis's answer, empty() is not correct for choice #1, because in php, the string '0' is equivalent to false - and empty() returns true for all values equivalent to false. So using empty, the code would skip printing if the value was '0'. If you want to exclude the empty string, see Augustu...
how to detect search engine bots with php?
How can one detect the search engine bots using php?
16 Answers
16
...
第一个Hello,OS World操作系统 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...0
其中，主要的步骤代码中都有详尽的注释，如有任何问题，请移步至论坛《深入OS》板块发帖讨论。
编译执行过程：
打开dos窗口，进入源码所在目录，执行命令nasm boot.asm -o pfos.img：
同目录下生成一个"pfos.img"软盘映...
How can javascript upload a blob?
...fd.append('data', soundBlob);
$.ajax({
type: 'POST',
url: '/upload.php',
data: fd,
processData: false,
contentType: false
}).done(function(data) {
console.log(data);
});
You need to use the FormData API and set the jQuery.ajax's processData and contentType to false.
...
Difference between require, include, require_once and include_once?
In PHP:
25 Answers
25
...
Get operating system info
...perating system info. I have not been able to find out how to do that with PHP, and wanted to try to figure it out.
7 Answe...
Which $_SERVER variables are safe?
...lett.org/blog/2006/mar/server-name-versus-http-host.
‡ See https://bugs.php.net/bug.php?id=64457, http://httpd.apache.org/docs/current/mod/core.html#usecanonicalphysicalport, http://httpd.apache.org/docs/2.4/mod/core.html#comment_999
Entirely arbitrary user controlled values
These values are no...
What is the most efficient/elegant way to parse a flat table into a tree?
Assume you have a flat table that stores an ordered tree hierarchy:
14 Answers
14
...
What is stdClass in PHP?
...
stdClass is PHP's generic empty class, kind of like Object in Java or object in Python (Edit: but not actually used as universal base class; thanks @Ciaran for pointing this out).
It is useful for anonymous objects, dynamic properties, ...
instantiate a class from a variable in PHP?
...r as I can tell) must declare the full namespace path of a class.
MyClass.php
namespace com\company\lib;
class MyClass {
}
index.php
namespace com\company\lib;
//Works fine
$i = new MyClass();
$cname = 'MyClass';
//Errors
//$i = new $cname;
//Works fine
$cname = "com\\company\\lib\\".$cname...