Add exams from exam58 to exam98

exam58/timeStamps.php

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+<?php
+//timestamps
+
+$time = time();
+$actual_time = date('H:i:s',$time);
+$actual_date = date('d.m.Y.', $time);
+
+$modified_time = date(' H:i:s d.m.Y.', strtotime('1 week 2 hours'));
+
+echo 'The current time is ' . $actual_time. ' '. $actual_date . '<br>';
+echo 'The modified time is ' . $modified_time;
+
+?>

exam60/RandomGenerator.php

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+<?php
+
+if(isset($_POST['roll'])){
+    $rand = rand(1,6);
+    echo 'You rolled a ' .$rand;
+}
+
+?>
+
+<form action="RandomGenerator.php" method="POST">
+    <input type="submit" name="roll" value="Roll dice">
+</form>

exam63/ServerVariables.php

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+ 
+ <h1>My page</h1>
+
+ <?php 
+ 
+//  include 'header.inc.php';
+
+//  $scrpit_name = $_SERVER['SCRIPT_NAME'];
+//  echo $scrpit_name . '<br>';
+
+//  $host_name = $_SERVER['HTTP_HOST'];
+//  echo $host_name;
+ 
+ 
+ $redirect = true;
+ $redirect_page = 'http://google.com';
+
+ if($redirect == true){
+    header('Location: '. $redirect_page);
+ }
+
+
+ ?>

exam63/header.inc.php

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+<form action="" method="POST">
+    <input type="submit" name="submit" value="Submit">
+</form>

exam65/VisitorsIP.php

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+<?php
+//How to get visitor ip address
+require 'config.inc.php';
+
+foreach($ip_blocked as $ip){
+    if($ip == $ip_address){
+        die('Your ip address, ' . $ip_address . ' has been blocked');
+    }
+}
+
+?>
+
+<h1>Welcome !</h1>

exam65/VisitorsIP2.php

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+<?php
+// Better way to get visitors IP
+
+$http_client_ip = $_SERVER['HTTP_CLIENT_IP'];
+$http_x_forwarded_for = $_SERVER['HTTP_X_FORWARDED_FOR'];
+$remote_addr = $_SERVER['REMOTE_ADDR'];
+
+if(!empty($http_client_ip)){
+    $ip_address = $http_client_ip;
+} else if(!empty($http_x_forwarded_for)){
+    $ip_address = $http_x_forwarded_for;
+} else {
+    $ip_address = $remote_addr;
+}
+
+echo $ip_address;
+?>

exam65/config.inc.php

@@ -0,0 +1,8 @@
+<?php
+
+$ip_address = $_SERVER['REMOTE_ADDR'];
+$ip_blocked = array('127.0.0.1', '100.100.100.100');
+
+
+
+?>

exam67/VisitorsBrowser.php

@@ -0,0 +1,12 @@
+<?php
+
+$browser = get_browser(null, true);
+$browser = strtolower($browser['browser']);
+
+if( $browser != 'chrome'){
+    echo 'You\'re not using Google chrome. Please do!';
+}
+
+
+
+?>

exam69/WorkingWithGET.php

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+
+<?php
+
+if(isset($_GET['day']) && isset($_GET['date']) && isset($_GET['year'])){
+    $day = $_GET['day'];
+    $date = $_GET['date'];
+    $year = $_GET['year'];
+    if(!empty($day) && !empty($date) && !empty($year)){
+        echo 'It is ' . $day . ' '. $date . $year;
+    } else {
+        echo 'Fill in all fields';
+    }
+}
+
+?>
+
+<form action="WorkingWithGET.php" method="GET">
+    Day: <br> <input type="text" name="day"><br>
+    Date: <br> <input type="text" name="date"><br>
+    Year: <br> <input type="text" name="year"><br><br>
+    <input type="submit" value="submit">
+</form>

exam69/WorkingWithPOST.php

@@ -0,0 +1,26 @@
+<?php
+
+$match = 'pass123';
+
+if(isset($_POST['password'])){
+    $pass = $_POST['password'];
+    if(!empty($pass)){
+        if($pass == $match){
+            echo 'Password is correct!';
+        } else {
+            echo 'Password is incorrect!';
+        }
+        
+    } else {
+        echo 'Please enter the password!';
+    }
+}
+
+?>
+
+
+
+<form action="WorkingWithPOST.php" method="POST">
+    Password: <br> <input type="password" name="password"><br>
+    <input type="submit" value="Submit">
+</form>

exam73/Cookie.php

@@ -0,0 +1,7 @@
+<?php 
+
+setcookie('username', 'nikola', time() + 1500);
+//ovako brisemo
+//setcookie('username', 'nikola', time()-1500);
+
+?>

exam73/Sessions.php

@@ -0,0 +1,14 @@
+<?php 
+
+session_start();
+
+if( isset($_SESSION['username']) && isset($_SESSION['age'])){
+    echo ' Welcome , ' , $_SESSION['username'] . '. You are ' . $_SESSION['age'] . 'years old.';
+} else{
+    echo 'Please log in.';
+}
+
+
+
+
+?>

exam73/set.php

@@ -0,0 +1,6 @@
+<?php
+session_start();
+$_SESSION['username'] = 'alex';
+$_SESSION['age'] = '21';
+
+?>

exam73/unset.php

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+<?php
+
+session_start();
+
+unset($_SESSION['username']);
+
+session_destroy();
+?>

exam73/view.php

@@ -0,0 +1,5 @@
+<?php
+
+echo $_COOKIE['username'];
+
+?>

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,

exam82/checkfile.php

@@ -0,0 +1,13 @@
+<?php
+
+$filename = 'file.txt';
+
+if(file_exists($filename)){
+    echo 'File already exists';
+} else {
+    $handle = fopen($filename, 'w');
+    fwrite($handle, 'Nothing');
+    fclose($handle);
+}
+
+?>

exam82/file.txt

@@ -0,0 +1 @@
+Nothing

exam82/files/firstfile.txt

@@ -0,0 +1 @@
+First file

exam82/files/secondfile.txt

@@ -0,0 +1 @@
+Second File

exam82/files/thirdfile.txt

@@ -0,0 +1 @@
+Third file

exam82/listingFiles.php

@@ -0,0 +1,16 @@
+<?php
+
+$directory = 'files';
+
+if ($handle = opendir($directory.'/')){
+    echo 'Looking inside \'' . $directory . '\': <br>';
+
+    while($file = readdir($handle)){
+        if ($file != '.' && $file != '..') {
+            echo '<a href="'.$directory.'/'.$file.'">'.$file.'</a><br>';
+        }
+    }
+
+}
+
+?>

exam82/rdfiles.php

@@ -0,0 +1,22 @@
+<?php
+
+$filename = 'filetodelete.txt';
+
+if(@unlink($filename)){
+    echo 'File <strong>'. $filename .'</strong> has been deleted';
+} else {
+    echo 'File cannot be deleted!';
+}
+
+$file = 'filetorename.txt';
+$rand = rand(10000,99999);
+
+if(@rename($file,$rand.'txt')){
+    echo 'File has been renamed successfully to ' . $rand;
+} else {
+    echo 'File cannot be renamed!';
+}
+
+
+
+?>

exam86/upload.php

@@ -0,0 +1,46 @@
+<?php
+
+$name = $_FILES['file']['name'];
+
+$strpos = strpos($name, '.');
+$extension = strtolower(substr($name, $strpos + 1));
+$type = $_FILES['file']['type'];
+
+$size = $_FILES['file']['size'];
+$max_size = 2097152;
+
+
+$tmp_name = $_FILES['file']['tmp_name'];
+
+
+
+if(isset($name)){
+    if(!empty($name)){
+        if($size <= $max_size){    
+            if(($extension == 'jpeg' || $extension =='jpg') && $type == 'image/jpeg' ){
+
+                $location = 'uploads/';
+
+            if(move_uploaded_file($tmp_name,$location . $name)){
+                    echo 'Uploaded';
+                } else {
+                    echo 'There was some error!';
+                }
+            }else {
+                echo 'File must be jpeg or jpg';
+            }
+        } else {
+            echo 'File must be under 2mb';
+        }
+    } else {
+        echo 'Choose some file!';
+    }
+}
+
+
+?>
+
+<form action="upload.php" method="POST" enctype="multipart/form-data">
+    <input type="file" name="file"><br><br>
+    <input type="submit" value="Submit">    
+</form>

exam92/FileBasedUniqueHC/count.php

@@ -0,0 +1,36 @@
+<?php 
+
+function hit_count(){
+
+    $ip_address = $_SERVER['REMOTE_ADDR'];
+
+    $ip_file = file('ip.txt');
+    foreach($ip_file as $ip){
+        $ip_single = trim($ip);
+        if ($ip_address == $ip_single){
+            $found = true;
+            break;
+        } else {
+            $found = false;
+            
+        }
+    }
+
+    if($found == true){
+        $filename = 'count.txt';
+        $handle = fopen($filename, 'r');
+        $current = fread($handle, filesize($filename));
+        fclose($handle);
+         $current_inc = $current + 1;
+
+        $handle = fopen($filename, 'w');
+        fwrite($handle,$current_inc);
+        fclose($handle);
+        
+        $handle = fopen('ip.txt', 'a');
+        fwrite($handle, $ip_address."\n");
+        fclose($handle);
+    }
+}
+
+?>

exam92/FileBasedUniqueHC/count.txt

@@ -0,0 +1 @@
+7

exam92/FileBasedUniqueHC/index.php

@@ -0,0 +1,7 @@
+<?php
+
+include 'count.php';
+
+hit_count();
+
+?>

exam92/FileBasedUniqueHC/ip.txt

@@ -0,0 +1,7 @@
+127.0.0.1
+127.0.0.1
+127.0.0.1
+127.0.0.1
+127.0.0.1
+127.0.0.1
+127.0.0.1

exam92/NotUniqueHC/count.php

@@ -0,0 +1,16 @@
+<?php
+
+function hit_count(){
+    $filename = 'count.txt';
+    $handle = fopen($filename,'r');
+    $current = fread($handle, filesize($filename));
+    fclose($handle);
+
+    $current_inc = $current + 1;
+
+    $handle = fopen($filename, 'w');
+    fwrite($handle, $current_inc);
+    fclose($handle);  
+}
+
+?>

exam92/NotUniqueHC/count.txt

@@ -0,0 +1 @@
+5

exam92/NotUniqueHC/notuHitcounter.php

@@ -0,0 +1,7 @@
+<?php
+
+include 'count.php';
+
+hit_count();
+
+?>

exam96/encryption.php

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+<?php 
+
+if (isset($_POST['password']) && !empty($_POST['password'])) {
+    $pass = md5($_POST['password']);
+    
+    $filename = 'hash.txt';
+    $handle = fopen($filename,'r');
+    $file_pass = fread($handle,filesize($filename));
+
+    if($pass == $file_pass){
+        echo 'Password ok!';
+    }else{
+        echo 'Incorrect passwrod';
+    }
+
+
+} else{
+    echo 'Please enter the password!';
+}
+
+
+?>
+
+<form action="encryption.php" method="POST">
+    Password:<input type="text" name="password"><br><br>
+    <input type="submit" value="Submit"> 
+</form>

exam96/hash.txt

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+5f4dcc3b5aa765d61d8327deb882cf99

exam98/index.php

@@ -0,0 +1,14 @@
+<?php
+
+$to = 'random@gmail.com';
+$subject = 'this is an email';
+$body = 'This is a test email \n\n Hope you got it!';
+$headers = 'From: noreply@gmail.com';
+
+if(mail($to, $subject, $body, $headers)){
+    echo 'Mail is send successfuly!';
+}else {
+    echo 'Error';
+}
+
+?>