How to use getColumnMeta? - php

Question

Currently I use MySQLi and I try to convert all my MySQLi to PDO.
In MySQLi I have this code and it work very fine:
// connection string in MySQLi
if ($query = $connection->prepare("SELECT u.ID as ID,
u.Username as Username,
u.Firstname as Firstname,
u.Lastname as Lastname,
// ... many more
FROM Users u
INNER JOIN Gender g ON u.Gender = g.id
// ... many more
WHERE u.ID = ?")) {
$query->bind_param('s', $_SESSION['ID']);
$query->execute();
$metaResults = $query->result_metadata();
$fields = $metaResults->fetch_fields();
$statementParams = '';
foreach ($fields as $field) {
if (empty($statementParams)) {
$statementParams.="\$column['" . $field->name . "']";
} else {
$statementParams.=", \$column['" . $field->name . "']";
}
}
$statment = "\$query->bind_result($statementParams);";
eval($statment);
$query->store_result();
$affected = $query->num_rows;
// this request return me only ONE row
if ($affected == 1) {
while ($query->fetch()) {
foreach ($column as $key => $value) {
if ($key == "lookingFor") {
$row_tmb[$key] = formatLookingFor($value, $language, "");
} else {
$row_tmb[$key] = utf8_encode($value);
$row_tmb[$key] = $value;
}
}
$results[] = $row_tmb;
}
$query->free_result();
$query->close();
$profileData = $results[0];
// ... other code
}
This is return to my all column names and all 1 data row and I'm verry happy. So, I try to convert this code into PDO with new PDO code:
// good connection string without error in PDO code and the same query as you see up.
if ($query = $connection->prepare($sql)) {
$query->execute();
$metaResultsColNumber = $query->columnCount();
for ($i = 0; $i < $metaResultsColNumber; $i++) {
$metaResults[] = $query->getColumnMeta($i, ['name']);
}
var_dump($metaResults);
$fields = $metaResults->fetchColumn();
var_dump($fields);
$statementParams = '';
foreach ($fields as $field) {
if (empty($statementParams)) {
$statementParams.="\$column['" . $field->name . "']";
} else {
$statementParams.=", \$column['" . $field->name . "']";
}
}
$statment = "\$query->bind_result($statementParams);";
eval($statment);
$query->store_result();
$affected = $query->num_rows;
// TRACE
printf("SQL %d row(s) return", $affected);
if ($affected == 1) {
while ($query->fetch()) {
foreach ($column as $key => $value) {
if ($key == "lookingFor") {
$row_tmb[$key] = formatLookingFor($value, $language, "");
} else {
$row_tmb[$key] = utf8_encode($value);
}
}
$results[] = $row_tmb;
}
$query->free_result();
$query->close();
$profileData = $results[0];
And I can't obtain 1) the right column names 2) the data of the returning row
I try to read help into this site and PHP MySQL PDO documentation from many hours.

Answer 1

Do you look for something like that?
//Datastrucure
include("pdo_dbconnect.php");
$stmt = $db->prepare('select * from information_schema.columns where table_name = "' . $_SESSION[$fenster .'_tabelle'] . '" and table_schema = "' .$database.'"');
$stmt->execute();
$f = -1;
while ($data = $stmt->fetch()) {
$f += 1;
//pmsg($data['COLUMN_NAME'] . ' ' .$data['DATA_TYPE'] . ' ' . $data['CHARACTER_MAXIMUM_LENGTH']);
$_SESSION['_fieldName'][$f] = $data['COLUMN_NAME'];
$_SESSION['_fieldLenght'][$f] = $data['CHARACTER_MAXIMUM_LENGTH'];
$_SESSION['_extra'][$f] = $data['EXTRA'];
}