what is stream in php

Stream in php is an abstraction layer used to read and write various data sources. It provides a unified I/O interface for applications in PHP programs. Its API is very flexible and Easy to use. Using Stream, data can be seamlessly read or written from various data sources such as file systems, network resources, memory buffers, compressed files, etc., without knowing the underlying implementation details.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

In PHP, Stream is an abstraction layer used for reading and writing operations on various data sources (files, network connections, etc.).

Stream allows PHP to perform basic I/O operations, such as reading, writing, appending, truncation, moving, etc.

The role of Stream is to provide a unified I/O interface for applications in PHP programs. Its API is very flexible and easy to use. Using Stream, you can seamlessly read or write data from various data sources such as file systems, network resources, memory buffers, compressed files, etc., without needing to know the underlying implementation details.

The following are several use cases of php-stream:

1. Reading network resources

$resource = fopen('http://www.example.com/', 'r');
while(!feof($resource)) {
 echo fgets($resource, 1024);
}
fclose($resource);

The above code demonstrates how to use fopen() The function opens a network resource stream and reads the data using the fgets() function.

2. Write a file

$filename = 'example.txt';
$handle = fopen($filename, 'w');
fwrite($handle, "Hello World!");
fclose($handle);

The above code demonstrates how to use the fopen() function to create a new file and open it It then uses the fwrite() function to write the data to the open file stream.

3. Read compressed files

$filename = 'example.gz';
$filehandle = gzopen($filename, 'r');
while(!gzeof($filehandle)) {
 $buffer = gzread($filehandle, 4096);
 echo $buffer;
}
gzclose($filehandle);

The above code demonstrates how to use the gzopen() function to open a compressed file stream and use the gzread() function to read it The data.

Stream is very widely used in PHP, almost every PHP application that needs to read and write data will use it.

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