php中检查下传文件的目录里是否已存在同名的下传文件
php中检查上传文件的目录里是否已存在同名的上传文件
检查上传文件的目录里是否已存在同名的上传文件
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function searchFile($path,$file){ $file_array=array(); //存放文件名数组 $folder_array=array(); //存放目录名数组 $all_array=array(); //存放全部路径的数组 if(is_dir($path)){ //检查文件目录是否存在 $H = @ opendir($path); while(false !== ($_file=readdir($H))){ //检索目录 if(is_dir($path."/".$_file) && $_file != "." && $_file!=".." && $_file!=="Thumbs.db"){ if(eregi('/'.$file,'/'.$_file)){ array_push($folder_array,$path."/".$_file); } searchFile($path."/".$_file,$file); //检索文件 }elseif(is_file($path."/".$_file) && $_file!="." && $_file!=".." && $_file!=="Thumbs.db"){ echo $_file; echo '<br>'; //$_file = auto_charset($_file,'utf-8','gbk'); if(eregi('/'.$file,'/'.$_file)){ array_push($file_array,$path."/".$_file); return 'yes'; //文件存在 } } } //$this->all_array["folder"]=$this->folder_array; //$this->all_array["file"]=$this->file_array; closedir($H); return 'no'; //不存在 }elseif(is_file($path)){ if(eregi($file,$path)){ //$this->all_array["file"]=$path; return 'yes'; //文件存在 } else { return 'no'; //文件不存在 } }else{ return 'no'; //文件不存在 } }
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To learn more about open source, please visit: 51CTO Hongmeng Developer Community https://ost.51cto.com Running environment DAYU200:4.0.10.16SDK: 4.0.10.15IDE: 4.0.600 1. To create an application, click File- >newFile->CreateProgect. Select template: [OpenHarmony] EmptyAbility: Fill in the project name, shici, application package name com.nut.shici, and application storage location XXX (no Chinese, special characters, or spaces). CompileSDK10, Model: Stage. Device

Use Java's File.length() function to get the size of a file. File size is a very common requirement when dealing with file operations. Java provides a very convenient way to get the size of a file, that is, using the length() method of the File class. . This article will introduce how to use this method to get the size of a file and give corresponding code examples. First, we need to create a File object to represent the file we want to get the size of. Here is how to create a File object: Filef

The usage of return in C language is: 1. For functions whose return value type is void, you can use the return statement to end the execution of the function early; 2. For functions whose return value type is not void, the function of the return statement is to end the execution of the function. The result is returned to the caller; 3. End the execution of the function early. Inside the function, we can use the return statement to end the execution of the function early, even if the function does not return a value.

How to convert php blob to file: 1. Create a php sample file; 2. Through "function blobToFile(blob) {return new File([blob], 'screenshot.png', { type: 'image/jpeg' })} ” method can be used to convert Blob to File.

How to set the PATH environment variable in Linux systems In Linux systems, the PATH environment variable is used to specify the path where the system searches for executable files on the command line. Correctly setting the PATH environment variable allows us to execute system commands and custom commands at any location. This article will introduce how to set the PATH environment variable in a Linux system and provide detailed code examples. View the current PATH environment variable. Execute the following command in the terminal to view the current PATH environment variable: echo$P

Use Java's File.renameTo() function to rename files. In Java programming, we often need to rename files. Java provides the File class to handle file operations, and its renameTo() function can easily rename files. This article will introduce how to use Java's File.renameTo() function to rename files and provide corresponding code examples. The File.renameTo() function is a method of the File class.

Use java's File.getParentFile() function to get the parent directory of a file. In Java programming, we often need to operate files and folders. When we need to get the parent directory of a file, we can use the File.getParentFile() function provided by Java. This article explains how to use this function and provides code examples. File class in Java is the main class used to operate files and folders. It provides many methods to obtain and manipulate file properties

Source code: publicclassReturnFinallyDemo{publicstaticvoidmain(String[]args){System.out.println(case1());}publicstaticintcase1(){intx;try{x=1;returnx;}finally{x=3;}}}#Output The output of the above code can simply conclude: return is executed before finally. Let's take a look at what happens at the bytecode level. The following intercepts part of the bytecode of the case1 method, and compares the source code to annotate the meaning of each instruction in
