Php statistics file size, in GB, MB, KB, B output_php tutorial

The size of the php statistics file, which is measured in GB, MB, KB, and B. Use the filesize () function command to calculate the file size. the value 1 must be an output of GB, MB, KB, and B. 2. the order of magnitude must be greater than 1 and less than 1024, and two decimal places must be retained. use the filesize () function command to calculate the file size. requirements: 1, it is an output in GB, MB, KB, and B. 2. the order of magnitude must be greater than 1 and less than 1024, and two decimal places must be retained;
Start:

The code is as follows:

$ Len = filesize ("1. rmvb ");
$ I = 4;
While ($ I ){
If ($ out = $ len/pow (1024, $ I)> 1.0 | $ I = 1 ){
Switch ($ I ){
Case 4: {printf ("%. 2f TB", $ out); break ;}
Case 3: {printf ("%. 2f GB", $ out); break ;}
Case 2: {printf ("%. 2f MB", $ out); break ;}
Case 1: {printf ("%. 2f KB", $ out); break ;}
}
Break;
}
$ I --;
}

Demo effect:
View sourceprint? 1.85 GB
2.70 GB
We are proud to find a simpler and more effective method (So Peifu) on the PHP Tutorial on the PHP official website)
The code is as follows:

The code is as follows:

Function format_bytes ($ size ){
$ Units = array ('B', 'KB', 'mb', 'GB', 'TB ');
For ($ I = 0; $ size >=1024 & $ I <4; $ I ++) $ size/= 1024;
Return round ($ size, 2). $ units [$ I];
}

Demo effect:
1.85 GB
2.7 GB
Of course there are more practices, but this method should be the simplest and fastest. I believe you have other methods. I look forward to sharing them with you!

The Compile () function command is used to calculate the file size. the value 1 must be an output of GB, MB, KB, and B. 2. the order of magnitude must be greater than 1 and less than 1024, and two decimal places must be retained; start...