ob_get_length Buffer and Acquisition Buffer Length Instance in php

This paper gives an example of ob_get_length buffer in php and the method of obtaining buffer length. Share it for your reference. The specific methods are as follows:

The file_get_contents () function reads the entire file into a string, just like file (), except that file_get_contents () reads the file into a string.

The file_get_contents () function is the preferred method for reading the contents of a file into a string, and memory-mapped techniques are used to enhance performance if supported by the operating system.

Syntax: file_get_contents (path, include_path, context, start, max_length)

ob_start();          // Open buffer  

echo "hello";         // Output content  

$out1= ob_get_contents();      // Get buffer contents  

echo "world";         // Output content  

$out2=ob_get_contents();       // Get the buffer contents again  

ob_end_clean();        // Empty the buffer and close  

echo $out1;         // Output number 1 Second obtained result  

echo "<br>"; 

echo $out2;         // Output number 2 The results obtained in order to compare 

This code is used when the output buffer is set to on (output_buffering=on)

List the output header information: print_r (ob_list_handlers ());

Refresh the buffer data, return the data and close the buffer: $buffer=ob_get_flush ();

Write buffer data to file: file_put_contents ('buffer. txt', $buffer);

List the output header information: print_r (ob_list_handlers ());

Get the buffer length, the example code is as follows:

// Open buffer  

ob_start(); 

// Output content  

echo "hello "; 

// Get buffer length  

$len1=ob_get_length(); 

// Re-output content  

echo "world"; 

// Get the length of the buffer again  

$len2=ob_get_length(); 

// Empty the buffer and close the buffer  

ob_end_clean(); 

// Output number 1 Length of secondary acquisition  

echo $len1; 

echo "<br>"; 

// Output number 2 The length of the acquisition to compare two different results  

echo $len2;

I hope this article is helpful to everyone's PHP programming.