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这段php代码详细演示了如何打开文件、读取文件和关闭文件，php中可以通过fopen打开文件，通过filesize函数获取文件大小，fread读取文件内容，fclose关闭文件
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- Reading a file using PHP
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$filename = "/home/user/guest/tmp.txt";
- $file = fopen( $filename, "r" );
- if( $file == false )
- {
- echo ( "Error in opening file" );
- exit();
- }
- $filesize = filesize( $filename );
- $filetext = fread( $file, $filesize );
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- fclose( $file );
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- echo ( "File size : $filesize bytes" );
- echo ( "" );
- ?>
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