Sanjib Sinha Posted January 21, 2011 Share Posted January 21, 2011 I want to add text to a file, getting it printed out in index.php and later want to edit/delete per row. I give codes page wise. first the form to take data: add.php: <?php ?> <form method="post" action="add_data.php"> <fieldset> <legend>Student List</legend> Name : <input type="text" name="uname" /><br> Content : <input type="text" name="age" /> <br> <input type="submit" name="submit" value="send" /> </fieldset> </form> Next adding text to a file: add_data.php: <?php $id = 1; if (file_exists("data.txt")) { $fp = fopen("data.txt", 'r'); $str = fread($fp, filesize("data.txt")); $str_arr = explode("|", $str); foreach ($str_arr as $rec) { if ($rec) { $id++; } } } $mode = (file_exists("data.txt"))? "a" : "w"; $fp = fopen("data.txt", $mode); $line = $id . "--" . $_POST['uname'] . "--" . $_POST['age'] . "|"; $res = fwrite($fp, $line); fclose($fp); header("location:index.php"); ?> In the index.php, I'd like to fetch data and edit them per row: <?php $fp = fopen("data.txt", 'r'); $str = fread($fp, filesize("data.txt")); $str_arr = explode("|", $str); echo "<table border='1'>"; echo "<tr><td>ID</td><td>Name</td><td>Age</td><td>Option</td></tr>"; foreach ($str_arr as $rec) { if ($rec) { $rec_arr = explode("--", $rec); echo "<tr>"; foreach ($rec_arr as $col) { echo "<td>$col</td>"; } print "<td><a href=\"edit.php?id=$id\">Edit</a>/<a href=\"delete.php?id=$id\">Delete</a></td></tr>"; } } echo "</table>"; echo "<a href=\"add.php\">Add Data</a>"; ?> Next I want to Edit per row: edit.php: <?php $fp = fopen("data.txt", 'r'); $str = fread($fp, filesize("data.txt")); $str_arr = explode("|", $str); foreach ($str_arr as $rec) { if ($rec) { $rec_arr = explode("--", $rec); $id = $rec_arr[0]; $name = $rec_arr[1]; $age = $rec_arr[2]; if ($id == $_REQUEST["id"]) { echo "<form action='edit_data.php' method='post'>"; echo "Name :<input type='text' name='uname' value='$name' /><br>"; echo "Age: <input type='text' name='age' value=$age /><br>"; echo "<input type='hidden' name='uid' value=$id />"; echo "<input type='submit' value='Edit'>"; echo "</form>"; } } } ?> From edit.php to edit_data.php where I practically try to edit per row: <?php $fp = fopen("data.txt", 'r'); $str = fread($fp, filesize("data.txt")); $str_arr = explode("|", $str); foreach ($str_arr as $rec) { if ($rec) { $rec_arr = explode("--", $rec); $id = $rec_arr[0]; $name = $rec_arr[1]; $age = $rec_arr[2]; if ($id == $_POST['uid']) { $new_str = $id . "--" . $_POST['uname'] . "--" . $_POST['age'] . "|"; } else { $new_str = $id . "--" . $name . "--" . $age . "|"; } } } fclose($fp); $fp = fopen("data.txt", 'w'); fwrite($fp, $new_str); fclose($fp); ?> The mechanism is simple. Taking datas from a form, explode them to an array and get them into col/row pattern to edit and delete them. But my problem is when I want to edit in index.php page, specially in this part: print "<td><a href=\"edit.php?id=$id\">Edit</a> It says, undefined index. But I try to catch this $id in the edit.php page, in this manner, as you see in my code: foreach ($str_arr as $rec) { if ($rec) { $rec_arr = explode("--", $rec); $id = $rec_arr[0]; $name = $rec_arr[1]; $age = $rec_arr[2]; if ($id == $_REQUEST["id"]) { echo "<form action='edit_data.php' method='post'>"; echo "Name :<input type='text' name='uname' value='$name' /><br>"; echo "Age: <input type='text' name='age' value=$age /><br>"; echo "<input type='hidden' name='uid' value=$id />"; echo "<input type='submit' value='Edit'>"; echo "</form>"; } } } Have I done any mistake here? If anyone points out, I'll be obliged. Quote Link to comment Share on other sites More sharing options...
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