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POHow to call SQL statements from a php function
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13173426
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2012-11-01T08:27:11.813
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2016-08-10T15:52:40.807
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2016-08-10T15:52:40.807
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<p>I'm trying to write a code where all SQL statements are stored inside a separate PHP file so I can call them later as functions.</p> <p>I've tried different things but I can't seem to make it work properly. </p> <p>Here is my code (I'm trying to make a login page here)</p> <p>login.php</p> <pre><code><?php include('sql.php'); $sql = new sql(); ?> <form class = "form-inline" method = "post" style="color: #FFF; position: absolute; margin-top:100px; margin-left:500px;"> <table width="100%" border="0"> <tr> <td>Username</td> <td><input type="text" id = "username" name = "username" class="large" placeholder=""></td> </tr> <tr> <td>Password</td> <td><input type="password" id = "password" name = "password" class="large" placeholder=""></td> </tr> </table> <br /> <center><button type="submit" id = "submit" name = "submit" class="btn btn-primary">Log in</button></center> </form> <?php //echo $sql->admin(); ?> <?php if(isset($_POST['submit'])) { // username and password sent from form $username=$_POST['username']; $password=$_POST['password']; // To protect MySQL injection (more detail about MySQL injection) $username = stripslashes($username); $password = stripslashes($password); $username = mysql_real_escape_string($username); $password = mysql_real_escape_string($password); //THIS IS THE PART WHERE I CALL THE SQL STATEMENT FROM A SEPARATE PHP FILE echo $sql->admin($username,$password); // Mysql_num_row is counting table row $count=mysql_num_rows($sql); // If result matched $username and $password, table row must be 1 row if($count==1) { //unset($_SESSION); $row = mysql_fetch_assoc($sql); $_SESSION[logged] = $row[logged]; // Register $username, $password and redirect to file "index.php" $_SESSION['username'] = $username; $_SESSION['password'] = $password; $_SESSION['submitted'] = $row[submitted]; $_SESSION['date_submitted'] = $row[date_submitted]; session_register($_SESSION['username']); session_register($_SESSION['password']); ?> <script>window.location="index.php";</script> <?php } else { ?> <center><span style="color:white;">Wrong Username or Password</span></center> <?php } } ?> </code></pre> <p>sql.php</p> <pre><code><?php include('connect.php'); class sql{ function sql() { } function admin($username,$password) { echo $sql=mysql_query("SELECT * FROM admin WHERE admin_username= '$username' and admin_password= '$password' "); } } ?> </code></pre> <p>The error that appears with this code is</p> <pre><code>Warning: mysql_num_rows(): supplied argument is not a valid MySQL result resource in login.php on line 40 </code></pre> <p>my line 40 is</p> <pre><code>$count=mysql_num_rows($sql); </code></pre> <hr> <p>I've finally got it. As you said, I've added a line in my sql.php which is </p> <pre><code> return $result; </code></pre> <p>another reason why my code didn't work was because I didn't place my </p> <pre><code> $sql->admin($username,$password); </code></pre> <p>inside a variable. Now it looks like this </p> <pre><code>$a = $result->admin($username,$password); </code></pre> <p>and it's working now.</p>
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How to call SQL statements from a php function
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