added session

20240926/char_check.php

@@ -1,14 +1,18 @@
 <?php
 
-$valid_input = $_POST['input_text'];
+$valid_input = $_SESSION["valid_input"];
 
 if (isset($_POST['input_char'])){
     $locations = array();
     for ($i=0; $i < strlen($valid_input); $i++) { 
-        if ($_POST['input_char'] == $valid_input[i]){
+        if ($_POST['input_char'] == $valid_input[$i]){
             array_push($locations, $i);
         }
     }
+    $_SESSION["locations"] = $locations;
+
+    foreach ($_SESSION["locations"] as $key => $value) {
+        echo "<p>".$_POST['input_char'].": $value </p>";
+    }
+}
 
-    echo $locations[0];
-}