使用php函数对数字索引数组的元素进行分级

Question

I intend to grade the elements of a numerically indexed array in php using function call; my function call does not work: it doesn't grade the elements and I cannot figure out the error in the code.Please help Thanks, in advance

 <?php

//function intended to  grade array elements

    function gradeArray($x){
        if($score>= 70){
    echo"A";


     }


       elseif($score >= 50){


     echo"B";
    }
    elseif($score>= 40){


     echo"C";


     }


     else{
    echo"F";


     }
    }

    // Array of Scores to be graded


      $scores = array ("55", "68", "43", "78");
//Display result in a tabular form


     echo"<table  border = '1'><th>Score</th><th>Grade</th>";

    foreach($scores as $score){



     echo"<tr><td>";



      echo$score."</td>";

    echo"<td>". gradeArray($score);

    echo"</td></tr>";



      }



       echo"</table>";

    ?>

Answer 1

You are passing $x into your function then calling $score. Your scores array is also in string format, just need to remove the quotes to make them numbers. Also change $x to $score and it should work fine! :)

<?php
//function intended to  grade array elements
function gradeArray($score) {
   if     ($score >= 70)  return "A";
   elseif ($score >= 50)  return "B";
   elseif ($score >= 40)  return "C";
   else                   return "F";
}

// Array of Scores to be graded
$scores = array (55, 68, 43, 78);

//Display result in a tabular form
echo "<table border='1'><th>Score</th><th>Grade</th>";

foreach ($scores as $score) {
    echo "<tr><td>$score</td><td>" . gradeArray($score) . "</td></tr>";
}

echo "</table>";
?>