1.socket_read:socket_read函数有两种读模式:PHP_BINARY_READ和PHP_NORMAL_READ。string$input=socket_read(*resource*$socket,int$length[,*int*$type=PHP_BINARY_READ/PHP_NORMAL_READ]);这两种模式最大的不同在于对于被读的信息的结束标志的要求。socket_read是一种阻塞型的函数,所谓阻塞就是别的事情都不做...
You probably wouldn't be here if you hadn't run into a scenario where you needed to leverage PHP to read a stream of binary data. The honest truth is PHP really stinks at this stuff, but as long as we're going to be using it we may as well do our best to make it as painless...
$binaryFile = ‘path/to/file.bin’; $fileData = file_get_contents($binaryFile); header(‘Content-Type: application/octet-stream’); header(‘Content-Disposition: attachment; filename=”file.bin”‘); echo $fileData; “` 这样就可以将二进制文件以下载的形式输出给用户。请确保服务器上的文件路...
尽管php是用C语言开发的,不过令我不解的是php没有提供对结构体struct的直接支持。 不过php提供了pack和unpack函数,用来进行二进制数据(binary data)和php内部数据的互转: 复制代码代码如下: string pack ( string $format [, mixed $args [, mixed $...]] ) //Pack given arguments into binary string accor...
***read研究开始 两者注释一个*/// socket_set_nonblock($socket_accept);// while(($buf_read_data = socket_read($socket_accept, 2, PHP_BINARY_READ)) !== false){//PHP_NORMAL_READ 不够length就阻塞,PHP_BINARY_READ不会// var_dump($buf_read_data."\n");// }/***read研究 结束 *//...
function is_gif($image_file){/* Open the image file in binary mode */if(!$fp = fopen ($image_file, 'rb')) return 0;/* Read 20 bytes from the top of the file */if(!$data = fread ($fp, 20)) return 0;/* Create a format specifier */$header_format = 'A6version'; # ...
// readfile($file); echo $row['backup']; exit; /* if (file_exists($file)) { header('Content-Description: File Transfer'); header('Content-Type: application/octet-stream'); header('Content-Disposition: attachment; filename='.basename($file)); header('Content-Transfer-Encoding: binary'...
Example #2 Binary fread() example Warning 在区分二进制文件和文本文件的系统上(如 Windows)打开文件时,fopen() 函数的 mode 参数要加上 'b'。 <?php$filename = "c:\\files\\somepic.gif";$handle = fopen($filename, "rb");$contents = fread($handle, filesize($filename));fclose($handle...
functionis_gif($image_file){/* Open the image file in binary mode */if(!$fp=fopen($image_file,'rb'))return0;/* Read 20 bytes from the top of the file */if(!$data=fread($fp,20))return0;/* Create a format specifier */$header_format='A6version';# Get the first 6 bytes/*...
functionis_gif($image_file){/* Open the image file in binary mode */if(!$fp=fopen($image_file,'rb'))return0;/* Read 20 bytes from the top of the file */if(!$data=fread($fp,20))return0;/* Create a format specifier */$header_format='A6version';# Get the first6bytes/* Unp...