Examples of ob_get_length buffering and obtaining buffer length in php, phpob_get_length

Examples of ob_get_length buffering and obtaining buffer length in php, phpob_get_length_PHP tutorial

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Release： 2016-07-13 10:13:21

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Instances of ob_get_length buffering and obtaining buffer length in php, phpob_get_length

The example in this article describes the method of ob_get_length buffering and obtaining the buffer length in php. Share it with everyone for your reference. The specific method is as follows:

The file_get_contents() function reads the entire file into a string. It is the same as file(). The difference is 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. If the operating system supports it, memory mapping technology will also be used to enhance performance.

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

Copy code The code is as follows:

ob_start(); //Open the buffer
echo "hello"; //Output content
$out1= ob_get_contents(); //Get buffer contents
echo "world"; //Output content
$out2=ob_get_contents(); //Get buffer contents again
ob_end_clean(); //Clear the buffer and close
echo $out1; //Output the result obtained for the first time
echo "
";
echo $out2; //Output the result obtained for the second time to compare

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

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

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

Copy the code The code is as follows:

//Open the buffer
ob_start();
//Output content
echo "hello ";
//Get buffer length
$len1=ob_get_length();
//Output the content
echo "world";
//Get the length of the buffer again
$len2=ob_get_length();
//Clear the buffer and close the buffer
ob_end_clean();
//Output the length obtained for the first time
echo $len1;
echo "
";
//Output the second obtained length to compare the two different results
echo $len2;

I hope this article will be helpful to everyone’s PHP programming design.