January 2021
Intermediate to advanced
505 pages
9h 45m
Chinese
Content preview from PHP编程：第4版
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472
｜
附录
A
函数参考
返回之前用
serialize()
序列化后在
data
中存储的值。如果值是对象并且有
__wakeup()
方法，那个方法会在恢复后被调用。
销毁给出的变量。一个在函数作用域内调用的全局变量只会销毁局部变量的副本。要销
毁全局变量，必须在
$GLOBAS
数组中调用
unset
。一个在函数作用域内按引用传递的变
量只会销毁变量的局部副本。
返回对使用
URL
编码的
url
解码后的字符串。
%
后跟十六进制数组成的字符序列会被逐
字替换为它们表示的字面值。例如，加号（
+
）会被替换为空格。参见
rawurlencode()
，
除了对空格的处理外，
urldecode()
和
rawurldecode()
是相同的。
返回使用
URL
编码对
url
编码后的字符串。除了横杠（
-
）、下画线（
_
）和句点（
.
）
外的非字母字符都会被替换为以
%
后跟十六进制数字组成的字符序列。例如，斜
杠（
/
）会被替换为
%2F
。另外，任何在
url
中的空格都会被替换为加号（
+
）。参见
rawurlencode()
，除了对空格的处理外，
urlencode()
和
rawurlencode()
是相同的。
暂停执行当前脚本
time
毫秒。
使用用户定义的函数排序数组
array
。提供的函数
function
以两个参数来调用。如果第一
个参数小于第二个参数，返回小于
0
的整数 ；如果相等返回
0
；如果第一个参数大于第
二个参数，返回大于
0
的整数。两个相等元素的排序顺序是不确定的。更多关于该函数
的信息可参见第
2
章。
如果排序成功，函数返回
true
，否则返回
false
。
输出 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.