What potential issues can arise when using $stmt->fetch() in PHP queries?

When using $stmt->fetch() in PHP queries, one potential issue that can arise is that it may return false if there are no more rows to fetch, which could lead to unexpected behavior in your code. To solve this issue, you can use a while loop to iterate over the fetched rows until false is returned. 

$stmt = $pdo->prepare("SELECT * FROM table");
$stmt->execute();

while ($row = $stmt->fetch()) {
    // process the fetched row here
}

Keywords

$stmt->fetch() PHP queries data retrieval SQL injection error handling

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