How does PHP use fread () to manipulate bytes
This article mainly explains "how to use fread () operation bytes in PHP". Interested friends may wish to have a look at it. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how PHP uses fread () operation bytes"!
Fread syntax
Fread (resource $handle, int $length): string
Handle: file system pointer, resource (resource) created by fopen ().
$length: the byte length of the read file.
Return value: a string of $length length.
1. Confirm the bytes to be read
/ / the file path $filename= ". / exit.txt"; / / get the file resource $file = fopen ($filename,'r'); / / when reading the binary file, set the second parameter to 'rb' / / get the file content $file_info=fread ($file,10); / / print the file content echo $file_info; / / close the file resource fclose ($file);? >
2. Do not confirm the bytes to be read
To get all the contents of a file, you need to use another function, the filesize () function, to see the size of the file.
/ / File path $filename= ". / exit.txt"; / / get the file resource $file = fopen ($filename,'r'); / / get the file size $file_size= filesize ($filename); / / get the file content $file_info=fread ($file, $file_size); / / print the file content echo $file_info; / / close the file resource fclose ($file) At this point, I believe you have a deeper understanding of "how PHP uses fread () operation bytes". You might as well do it in practice. Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!
