php对象的使用

壹小俊发布时间：2020-03-06 18:36:11 ，浏览量：2

1.有时候我们直接对不存在的数组直接定义其下标的值,不会报错,但是我们定义不存在的对象的时候,就会报错,这个时候我们定义一个空对象即可.有以下三种方法:


    
        
        
        
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	请求信息 : 2025-07-04 16:02:28 HTTP/2.0 GET : /home/article/detail/id/386507.html
运行时间 : 0.0639s ( Load:0.0151s Init:0.0024s Exec:0.0411s Template:0.0053s )
吞吐率 : 15.65req/s
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查询信息 : 12 queries 0 writes 
文件加载 : 18
缓存信息 : 5 gets 0 writes 
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会话信息 : SESSION_ID=6405ht1h4pijrr4308uajp3c5a
    
    
        
    
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/www/wwwroot/www.chaojiit.com/ThinkPHP/ThinkPHP.php ( 4.71 KB )
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/www/wwwroot/www.chaojiit.com/ThinkPHP/Library/Behavior/ShowPageTraceBehavior.class.php ( 5.27 KB )
    
    
        
    
	    
    
        
    
	[2] session_save_path(): open_basedir restriction in effect. File(/var/lib/php/session) is not within the allowed path(s): (/www/wwwroot/www.chaojiit.com/:/tmp/) /www/wwwroot/www.chaojiit.com/Application/Runtime/common~runtime.php 第 1 行.
[8192] Array and string offset access syntax with curly braces is deprecated /www/wwwroot/www.chaojiit.com/ThinkPHP/Library/Think/Cache/Driver/File.class.php 第 59 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 35 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 140 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 140 行.
[8] Undefined variable: user /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 141 行.
[8] Trying to access array offset on value of type null /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 141 行.
[8] Undefined variable: pinglun_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 150 行.
[8] Undefined variable: top_list /www/wwwroot/www.chaojiit.com/Application/Runtime/Cache/Home/3c8a1a47a3534a7b1252c226abfc3928.php 第 185 行.
    
    
        
    
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