PHP fgets function reads extra whitespace to resolve

PHP with Fgets read the string, it would have encountered a newline stop reading, but the actual will be in the back of the string to read something, I feel is the cause of Windows line, \ r \ n, this may be the reason, there is always a space, resulting in the use of the string I always error.

In a try, mainly using fgetc, and case, found that the end of the string has two ASCII 0 characters, these two things caused the string after the space.

while (!feof ($myfile)) {        $data 1 = fgets ($myfile);        $i = strlen ($data 1);        Str_replace (Array (' \ n ', ' \ R ', ' \n\r ', '), ' V ', $data 1);        Switch ($data 1) {case             0:                  # code ...             echo 0;                  break;             Case Ten:             Echo ten;             break;             Default:                  # code ...             echo one;                  break;        }                    echo $i;          $i + +;          echo "AA". $data 1. " AA ";                    echo "
";          echo "AA". substr ($data 1,0, $i-2). " AA ";                    echo "
";          }

So the decisive use of string intercept function, cut off the last two characters just fine.

$i = strlen ($data 1); echo "AA". substr ($data 1,0, $i-2). " AA ";

This will be read normally, but the last line of string will be followed by a space

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