比较两个字符串并确定它们是否相等

Question

I have two strings that am trying to compare but it is displaying that they are not equal. What could be the problem? Here is the code that am running.

     <?php
        $x = "Come and enjoy the show.";
        $y = "Come and enjoy the show.";

       if (strcmp($x, $y)) {
          echo "They are the same.";
       } else {
           echo "They are not the same.";
       }
     ?>

Answer 1

strcmp - It returns zero on exact match & hence else condition will get executed in your case.

Defination : Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.

Change your condition with,

if (strcmp($x, $y) === 0) {
  echo "They are the same.";
} else {
  echo "They are not the same.";
}

DEMO .

Answer 2

strcmp can returns multiple values.

From the doc :

Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.

So, instead try this code :

   if (strcmp($x, $y) === 0) {
      echo "They are the same.";
   } else {
       echo "They are not the same.";
   }
 ?>

Answer 3

try this...

strcmp function Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.

if (strcmp($x, $y) === 0) {
          echo "They are the same.";
       } else {
           echo "They are not the same.";
       }