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                            - parse_url &emsp;&emsp;#解析 URL，返回其組成部分
- sleep &emsp;&emsp;&emsp;&emsp;#延緩執行
示例一：excel導入
![](https://box.kancloud.cn/897cf3e0e6f19ed617fa86c5ffec1537_709x114.png)
``` php
示例二：生成php慢日志
???? echo date("h:i:s")."";  
??? ?sleep(2);  
??? ?echo date("h:i:s");
```
- filter_var &emsp;&emsp;#使用特定的過濾器過濾一個變量
``` php
filter_var($email,FILTER_SANITIZE_EMAIL);    //待過濾的變量，過濾規則是一個常量
```
![](https://box.kancloud.cn/c8f3ac31c6dd1e493eb4c188c7838644_801x121.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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