Add exams from exam58 to exam98

exam77/file.php

@@ -0,0 +1,45 @@
+<?php
+
+//Writing to a file 
+// $handle = fopen('names.txt', 'w');
+
+// fwrite($handle,'Alex' . "\n");
+// fwrite($handle, 'Nikola');
+
+// fclose($handle);
+
+//Appending a file
+
+
+if(isset($_POST['name'])){
+    $name = $_POST['name'];
+
+    if(!empty($name)){
+        $handle = fopen('names.txt', 'a');
+        fwrite($handle, $name ."\n");
+        fclose($handle);
+
+        echo 'Current names in file: ';
+
+        $count = 1;
+        $readin = file('names.txt');
+        $readin_count = count($readin);
+        foreach($readin as $fname){
+            echo trim($fname);
+            if($count < $readin_count){
+                echo ', ';
+            }
+            $count++;
+        }
+    } else {
+        echo 'Write some name!';
+    }
+}
+
+?>
+
+<form action="file.php" method="POST">
+    Name:<br>
+    <input type="text" name="name"><br><br>
+    <input type="submit" value="Submit">
+</form>

exam77/file2.php

@@ -0,0 +1,17 @@
+<?php
+
+$filename = 'names.txt';
+$handle = fopen($filename, 'r');
+
+$datain = fread($handle, filesize($filename));
+
+$names_array = explode(",", $datain);
+
+foreach($names_array as $name){
+    echo $name . '<br>';
+}
+
+$string = implode(":", $names_array);
+
+
+?>

exam77/names.txt

@@ -0,0 +1,12 @@
+Nicke,
+Branko,
+Steven,
+Alex,
+Sandra,
+Sandra,
+Dane,
+Marko,
+Krle,
+Petar,
+Aleksa,
+Brana,