PDO version of mysql_num_rows($result)==0) [duplicate] - php

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Closed 10 years ago.
Possible Duplicate:
Alternative for mysql_num_rows using PDO
^ I believe it isn't the same question - The other authors code is different to mine, which needed a different answer. I successfully got my answer from this post and marked it as answered. Everything is working fine now (no help from the other 'duplicate' thread.
I want to display a "No Client Found" message if no results are found, Is there a PDO method to the following code?:
$result = mysql_query($sql) or die(mysql_error()."<br />".$sql);
if(mysql_num_rows($result)==0) {
echo "No Client Found";
I tried the following...
<?php
$db = new PDO('mysql:host=localhost;dbname=XXXXXXXXXXXX;charset=utf8','XXXXXXXXXXXX', 'XXXXXXXXXXXX');
$query = $db->query('SELECT * FROM client');
if ($query == FALSE) {
echo "No Clients Found";
}
else
{
foreach($query as $row)
{
<some code here>
}
}
?>
Am I missing something?
I've read: http://php.net/manual/en/pdostatement.rowcount.php but hasn't helped

Answer 1

<?php
$db = new PDO('mysql:host=localhost;dbname=XXXXXXXXXXXX;charset=utf8','XXXXXXXXXXXX', 'XXXXXXXXXXXX');
$query = $db->query('SELECT * FROM client WHERE ID = 10');
if ($query->rowCount() != 1) {
echo "No Clients Found";
}
else
{
foreach($query as $row)
{
<some code here>
}
}
?>
In PDO, rowCount method is used to count the returned results. Your query must select some thing unique, like an email address or username if you want to check for unique existence, else, if you want at least find one row, change the condition to this:
if ($db->rowCount() == 0)
There is a tutorial: PDO for MySQL developers.

Answer 2

PDOStatement::rowCount() does not return the number of rows affected by a SELECT statement in some databases. Documentation The code below uses SELECT COUNT(*) and fetchColumn(). Also prepared statements and try & catch blocks to catch exceptions.
<?php
// Get parameters from URL
$id = $_GET["client"];
try {
$db = new PDO('mysql:host=localhost;dbname=XXXX;charset=utf8', 'XXXX', 'XXXX');
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// Prepare COUNT statement
$stmt1 = $db->prepare("SELECT COUNT(*) FROM client WHERE client = ?");
// Assign parameters
$stmt1->bindParam(1,$id);
$stmt1->execute();
// Check the number of rows that match the SELECT statement
if($stmt1->fetchColumn() == 0) {
echo "No Clients Found";
}else{
//echo "Clients Found";
// Prepare Real statement
$stmt2 = $db->prepare("SELECT * FROM client WHERE client = ?");
// Assign parameters
$stmt2->bindParam(1,$id);
$stmt2->setFetchMode(PDO::FETCH_ASSOC);
$stmt2->execute();
while($row = $stmt2->fetch()) {
//YOUR CODE HERE FROM
// Title
echo '<div id="portfolio_detail">';
//etc.etc TO
echo '<div><img src="'."/client/".$row[client].'_3.png"/></div>';
echo '</div>';
}//End while
}//End if else
}//End try
catch(PDOException $e) {
echo "I'm sorry I'm afraid you have an Error. ". $e->getMessage() ;// Remove or modify after testing
file_put_contents('PDOErrors.txt',date('[Y-m-d H:i:s]').", myfile.php, ". $e->getMessage()."\r\n", FILE_APPEND);
}
//Close the connection
$db = null;
?>