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October 24, 2017 18:59
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a simple PHP CRUD example. BTW I suggest to use Visual Studio Code + XDebug for coding and debugging.
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| <!doctype html> | |
| <html> | |
| <head> | |
| <title></title> | |
| <meta charset="UTF-8"> | |
| </head> | |
| <body> | |
| <form method="post"> | |
| <input name="name" placeholder="name"> | |
| <input name="cost" placeholder="cost"> | |
| <input type="submit"> | |
| </form> | |
| <?php | |
| try { | |
| $dbh = new PDO('sqlite:items.sqlite'); | |
| $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); | |
| $stmt = $dbh->prepare("create table if not exists items(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT UNIQUE, cost FLOAT)"); | |
| $stmt->execute(); | |
| if(!empty($_REQUEST['name'])){ | |
| echo 'subimitted item<br>'; | |
| $stmt = $dbh->prepare("select sum(cost) from items where name=?"); | |
| $stmt->execute([$_REQUEST['name']]); | |
| $rows = $stmt->fetchAll(); | |
| $cost = floatval($_REQUEST['cost']); | |
| if($rows[0][0]==null){ | |
| $stmt = $dbh->prepare("insert into items(name,cost) values(?,?)"); | |
| $stmt->execute([$_REQUEST['name'], $cost]); | |
| }else{ | |
| $new_cost = $cost + $rows[0][0]; | |
| if($new_cost != 0.0){ | |
| echo 'update<br>'; | |
| $stmt = $dbh->prepare("update items set cost=? where name=?"); | |
| $stmt->execute([$new_cost, $_REQUEST['name']]); | |
| }else{ | |
| echo 'delete<br>'; | |
| $stmt = $dbh->prepare("delete from items where name=?"); | |
| $stmt->execute([$_REQUEST['name']]); | |
| } | |
| } | |
| }else{ | |
| echo 'empty fields.<br>'; | |
| } | |
| $stmt = $dbh->prepare("select * from items"); | |
| $stmt->execute(); | |
| ?> | |
| <table border="1"> | |
| <tr><td>name</td> <td>cost</td></tr> | |
| <?php | |
| foreach($stmt->fetchAll() as $row){ | |
| echo '<tr><td>'.$row['name'].'</td><td>'.$row['cost'].'</td></tr>'; | |
| } | |
| ?> | |
| </table> | |
| <?php | |
| } | |
| catch(Exception $e) { | |
| echo 'Exception -> '; | |
| var_dump($e->getMessage()); | |
| } | |
| ?> | |
| </body> | |
| </html> |
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