PHP file Operations

<! DOCTYPE html Public"-//w3c//dtd XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >PHP// file Operation//1. You can only manipulate the server's file//2. Files contain directories and files//Judging file Types//var_dump (filetype ("./img")); Returns the type of file: Directory dir file File//var_dump (Is_dir ("./img")); Determine if the path is not correctly returned by the directory true error//var_dump (Is_file ("./add.php")); To determine if the path is correct, return a true error return false//file property//echo date ("Y-m-d h:i:s", Fileatime ("./add.php")); Last Access time//echo date ("Y-m-d h:i:s", Filectime ("./add.php")); Creation time//echo date ("Y-m-d h:i:s", Filemtime ("./add.php")); Modification Time//echo filesize ("./add.php"); The file size, in bytes//var_dump (file_exists ("./add.php")); Determine if the file exists//file path//current path:./parent directory:. /Subordinate Directory: Directory//root path:///If the root (/) path inside PHP represents: The root of the disk//if the root (/) path inside the page represents: root of the server (www directory)//echo $_server[' document_root '); Fetch the root path of the server//echo basename ("./add.php"); Gets the filename with the suffix//echo basename ("./add.php", ". php") from the path; Gets the file name without a suffix from the path//echo dirname ("./img/aa.php"); Directory//var_dump (PathInfo ("./img/aa.php") that removes the filename from the fetch path; Returns the directory information, formatted as an array//echo realpath ("./img/aa.php"); Convert relative path to absolute path//Operation directory//var_dump (Glob ("./img/*")); Get all Files under directory * A suffix of *.php /*$attr = Glob ("./img/*"); for ($i =0; $i <count ($attr); $i + +) {echo $attr [$i]. " <br> ";}*///use global variables to calculate the number of files and folders/*//define two variables $filenum=0; $dirnum = 0; Num ("./img"); echo "The number of files is:". $filenum. "    The number of <br> "; echo" Folders is: ". $dirnum; function num ($url) {global $filenum;        Use global variables to $dirnum;        Use global variables//To determine if the path is not a file if (Is_file ($url)) {$filenum = 1;        return $filenum;        Exit }//Gets all the sub-files under the directory $attr =glob ($url. "        /*");            Traverse all child files foreach ($attr as $v) {if (Is_file ($v)) {$filenum + +;            } else {$dirnum + +;            Num ($v); }        }}*///calculate only the number of files/*Echo Num ("./img"); function num ($url) {$filenum = 0;        Determines whether the given path is not a file if (Is_file ($url)) {$filenum = 1;        return $filenum;        Exit }//Gets all the sub-files under the directory $attr =glob ($url. "        /*");            Traverse all child files foreach ($attr as $v) {if (Is_file ($v)) {$filenum + +;            } else {$filenum = $filenum +num ($v); }} return $filenum;}*///Calculate Folder Size/*Echo Dirsize ("./img"); function Dirsize ($url) {//define variable store file size $size = 0;        Determine if the path given is not a file if (Is_file ($url)) {return filesize ($url);    Exit }//If it is a directory, fetch all files under the directory $attr = Glob ($url. "        /*");        Traverse Sub-file foreach ($attr as $v) {if (Is_file ($v)) {$size = $size + filesize ($v);        } else {$size = $size + dirsize ($v); }} return $size;}*///using directory Resource traversal$dir=Opendir("./img");//Open the Directory resource//echo Readdir ($DIR);//Read the file in the directory, perform a read one while($WJ=Readdir($dir)){    Echo $WJ." <br> ";}Closedir($dir);//Close the directory resource//rewindder ($DIR);//Reset the pointer//use READDIR () to read the first and second contents//First is. Represents the current directory//The second is: Represents a parent directory// When using directory resources to traverse a folder, be careful to exclude the first two?></body>View Code
<! DOCTYPE html Public"-//w3c//dtd XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >PHP//directory Operation//1. Create a directory (folder)//mkdir ("./test");//2. Deleting a directory (folder) can only delete empty folders//rmdir ("./test");//3. Moving directories (folders) is equivalent to cutting internal content and then moving/ Rename ("./test", ".. /test11 "); File Operation//touch ("./test.txt");//Create File//copy ("./test.txt", "... /test.txt "); Copy file//unlink ("./test.docx"); Delete file//echo file_get_contents ("./test.txt"); Get file contents: TXT type and page content//echo file_get_contents ("http://www.baidu.com"); Remotely get content//file_put_contents ("./test.txt", "Hello"); Write content to the file and empty the original content//readfile ("./test.txt"); Get the contents of the file and output//var_dump directly ("./test.txt"); Read the contents of the file, return the array, each element of the array corresponds to a line//to the contents of the file Operation//1. Open File resource//$fp = fopen ("./test.txt", "a");//Operation file//echo fgetc ($FP); Read one character at a time/*while (!feof ($FP))//Determine if the file reads to the end {echo fgetc ($fp);}*///Echo fgets ($FP);//read one line//echo fgets ($fp),//echo fread ($FP, 10);//Read specific length//$str = "Ni hao dhakhdak \ r \ n Akdhka";//$str = Iconv ("Utf-8", "gb2312", $str);//fwrite ($fp, $str);//2. Close File Resource//fclose ($FP);//world document Excel document from the Internet//job: File Manager// Find a directory (manage the files in this directory)//display the directory of all files//files at the top of the back of the upper button can return to the parent folder?></body>View Code
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 // var_dump (FileType ("... /0529 ")); Returns the type of file: Directory dir file File//var_dump (Is_dir (". /11.php ")); Determine if the path is directory//var_dump (Is_file (". /11.php ")); Determine if the path is file//echo filesize (".. /11.php "); The file size, in bytes, of//var_dump (File_exists (". /12.php ")); Determine if the file exists//current path:./parent directory:. /Subordinate Directories: Directory/ROOT path:///If the root (/) path inside PHP represents: The root of the disk//if the root (/) path inside the Web page represents: the root of the server (www directory)//var_dump (PathInfo (". /0529/aa.php ")); Returns the directory information, formatted as an array//echo realpath (". /0529/aa.php "); Convert relative path to absolute path   // 1. Create a directory (folder)//mkdir ("./test");//2. Deleting a directory (folder) can only delete empty folders//rmdir ("./test");//3. Move directory (folder)//rename ("./test", ". /test11 "); Touch ("./test.txt");//Create File//copy ("./test.txt", ". /test.txt "); Copy file//unlink ("./test.docx"); Delete file//echo file_get_contents ("./test.txt"); Get file Contents: TXT page   file resource  
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PHP file Operations