字符串比较始终返回false

Question

I'm uploading generic files with php, I read the first line of the uploaded file to validate (which is equals to $line2).

$line = file($target_file)[0];
$line2 = 'S01700006275696C642F697269732F6D61696E2E7372656343 ';

echo $line;
echo "<br>";
echo $line2;                                

if($line === $line2){
    echo "<br>true";
}else{
  echo "<br>false";}

Checking my outputs, I discovered theres an extra space in $line (Although there's no extra space on the file), So I added that extra space to $line2.

Problem is it always returns false. I have tried:

if($line == $line2)

as well as

if(strcmp($line,$line2)==0)

Obviously I tried removing the extra space from $line2

Answer 1

You can try:

$line = file($target_file)[0];
$line2 = 'S01700006275696C642F697269732F6D61696E2E7372656343 ';

echo $line;
echo "<br>";
echo $line2;                                

if(trim($line) === trim($line2)){
    echo "<br>true";
}else{
  echo "<br>false";
}