PHP fopen()和 file
1 $file = fopen ( 11.txt , r ) or exit ( Unabletoopenfile! ); //fopen打开文件,如果不存在就显示打不开。 2 $filesize = filesize ( 11.txt ); //计算文件大小 3 echo fread ( $file , $filesize ); //读取文件 4 fclose( $file ); //关闭文件 fopen(
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$file = fopen ( "11.txt" , "r" ) or exit ( "Unable to open file!" ); //fopen打开文件,如果不存在就显示打不开。
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2
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$filesize = filesize ( "11.txt" ); //计算文件大小
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echo fread ( $file , $filesize ); //读取文件
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4
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fclose( $file ); //关闭文件
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fopen()打开文件例子,
fclose()用不用在页面上都没有体现,但是如果不用fclose()的话,被打开的文件会一直占用资源。
fopen ( )打开网址例子:
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$web = "http://www.baidu.com" ; // http:// 不加的话就无法加载
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2
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$fp = fopen ( $web , 'r' );
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if ( $fp ){
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4
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while (! feof ( $fp )){
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echo fgets ( $fp );
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6
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}
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7
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}
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feof()检查文件是否到末端 ,到末端返回1,没有到返回0;
fgets()是逐行读取。
file_get_contents()例子;
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$web = "http://www.baidu.com " |
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$fcontent = file_get_contents ( $web );
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echo $fcontent ;
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显然file_get_contents()更为简单。
而且在实验过程中我发现,如果在 $web =""中 不加www. 会直接跳转,加www.会在本页加载。

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