HOW TO GET QUERY IN SQL USING PHP IN SQL TIGGERING - php

Question

This is my code my $sql variable didn't give query plese help me for this I try this but I couldn't please help me with that
<?php
$connect = mysqli_connect("localhost", "root", "", "finger");
$f= "";
$l= "";
$sql = "CREATE TRIGGER `ersdmmmmecv` AFTER INSERT ON `event` FOR EACH ROW SELECT fname,Lname INTO $f,$l FROM user WHERE id=NEW.id;"
$result = mysqli_query($connect, $sql);
?>

Answer 1

You cannot use a MySQL trigger to update PHP variables. If you want the values of $f and $l to update whenever a new record is inserted into your event table, you need to do this in PHP entirely.
Something along these lines should work (note: I did not test this myself):
$f = "";
$l = "";
$new_id = "id_value";
$insert = $connect->prepare("INSERT INTO `event` (`id`, `column2`, `column3`) VALUES (?, ?, ?)");
$insert->bind_param("sss", $new_id, "value2", "value3");
if ($insert->execute() === FALSE) {
echo 'Could not insert event: ' . $insert->error;
} else {
// If `event`.`id` is actually an AUTO_INCREMENT column, and you don't
// specify it in your INSERT query, use this here:
// $new_id = $insert->insert_id;
$select = $connect->prepare("SELECT `fname`, `Lname` FROM `user` WHERE `id` = ?");
$select->bind_param("s", $new_id);
$select->execute();
$select->bind_result($f, $l);
$success = $select->fetch();
if ($success !== TRUE) {
echo 'Could not update $f and $l with new values: '
. ($select->error ?: 'No user with id: ' . $new_id);
}
}
If you have multiple places in your code where you insert data into the events table, I would personally wrap this in a function so I wouldn't have to repeat this every time.

Answer 2

This is the Trigger Solution
<?php
$connect = mysqli_connect("localhost", "root", "", "finger");
$sql1 = "CREATE TRIGGER `ersdmmmmecv` AFTER INSERT ON `event` FOR EACH ROW INSERT INTO res (fres,lres) VALUES SELECT fname,Lname FROM user WHERE id=NEW.id;";
$result2 = mysqli_query($connect, $sql1);
$sql = "SELECT * FROM res;";
if( !( $selectRes = mysqli_query($connect, $sql) ) ){
echo 'Retrieval of data from Database Failed - #';
}else{
?>
<table border="2">
<thead>
<tr>
<th>fName</th>
<th>lname</th>
</tr>
</thead>
<tbody>
<?php
if( mysqli_num_rows( $selectRes )==0 ){
$print_output= '<tr><td colspan="4">No Rows Returned</td></tr>';
}else{
while( $row = mysqli_fetch_assoc( $selectRes ) ){
$print_output="<tr><td>{$row['fres']}</td><td>{$row['lres']}</td></tr>\n";
}
}
?>
</tbody>
</table>
<?php
try
{
$fp=pfsockopen("127.0.0.1", 80);
fputs($fp, $print_output);
fclose($fp);
echo 'Successfully Printed '.$print_output;
}
catch (Exception $e)
{
echo 'Caught exception: ', $e->getMessage(), "\n";
}
?>
<?php
}
?>
<?php
$sql2= "DROP TRIGGER ersdmmmmecv";
$result1 = mysqli_query($connect, $sql2);
$sql3= "DELETE FROM res;";
$result3 = mysqli_query($connect, $sql3);
?>
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// just show current time stamp to see time of last refresh.
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