The reading efficiency of PHP text file _php skill

Home about 3KB, is the local test

Copy Code code as follows:

file_get_contents (' Shadow.xml ');

Takes 0.0003 seconds

Copy Code code as follows:

$indexFile = fopen (' Shadow.xml ', ' R '); while (!feof ($indexFile)) fgetc ($indexFile);

Takes 0.026 seconds

Copy Code code as follows:

$indexFile = fopen (' Shadow.xml ', ' R '); Fread ($indexFile, 10000);

Takes 0.0003 seconds
The difference is nearly 100 times times!! It's a surprise.

I guess the time was all sacrificed on the while loop or somehow