php中readline与fread / fgets的区别

Question

I have always used readline in my console commands before, but today I've come across the fread and fgets functions and my question is: what is the difference in using these two approaches:

// first
$inputLine = readline();

// second
$inputLine = fgets(STDIN);

they both do pretty much the same, do they not?

Answer 1

The only possible difference I can think of is just that readline() takes no arguments and can only read input from STDIN by default, whilst fgets() can take any resource to read from. So, in other words readline() is a synonym to fgets with the first predefined argument, like, for instance, fprintf() and printf().

Consider the following:

fprintf(STDOUT, "hello!");
printf("hello!);

This is quite common in php standard library.