


Addressing the Non-Object Property Access Error in PHP
The error message "Notice: Trying to get property of non-object" typically occurs when attempting to access properties of an object that has not been properly initialized or doesn't exist. In the provided code, this error arises due to an issue with the mysql_fetch_object() function.
The mysql_fetch_object() function retrieves a single row from a result set as an object. In your control page, you are correctly using this function to fetch a single sidemenu record:
$results = mysql_query("SELECT * FROM sidemenu WHERE `menu_id`='".$menu."' ORDER BY `id` ASC LIMIT 1", $con); $sidemenus = mysql_fetch_object($results);
However, in your view page, you are trying to iterate over the $sidemenus variable as if it were an array of objects:
foreach ($sidemenus as $sidemenu): echo $sidemenu->mname."<br>"; endforeach;
This assumption is incorrect because mysql_fetch_object() returns an object, not an array of objects. To resolve this issue, you have two options:
1. Use a while Loop:
You can use a while loop to iterate over the result set and retrieve each sidemenu record as an object:
$results = mysql_query("SELECT * FROM sidemenu WHERE `menu_id`='".$menu."' ORDER BY `id` ASC LIMIT 1", $con); $sidemenus = array(); while ($sidemenu = mysql_fetch_object($results)) { $sidemenus[] = $sidemenu; } foreach ($sidemenus as $sidemenu): echo $sidemenu->mname."<br>"; endforeach;
This approach creates an array of sidemenu objects, allowing you to iterate over them as needed.
2. Use PDO (Preferred):
PDO is a more modern and recommended database abstraction layer that provides improved security and flexibility. Using PDO, you can retrieve data as objects using the fetchAll(PDO::FETCH_OBJ) method. Here's how you would do it:
$stmt = $con->prepare("SELECT * FROM sidemenu WHERE `menu_id`=? ORDER BY `id` ASC LIMIT 1"); $stmt->execute(array($menu)); $sidemenus = $stmt->fetchAll(PDO::FETCH_OBJ); foreach ($sidemenus as $sidemenu): echo $sidemenu->mname."<br>"; endforeach;
The above is the detailed content of Why am I getting a 'Trying to get property of non-object' error in PHP when accessing database results?. For more information, please follow other related articles on the PHP Chinese website!

This article explores optimizing MySQL memory usage in Docker. It discusses monitoring techniques (Docker stats, Performance Schema, external tools) and configuration strategies. These include Docker memory limits, swapping, and cgroups, alongside

This article addresses MySQL's "unable to open shared library" error. The issue stems from MySQL's inability to locate necessary shared libraries (.so/.dll files). Solutions involve verifying library installation via the system's package m

The article discusses using MySQL's ALTER TABLE statement to modify tables, including adding/dropping columns, renaming tables/columns, and changing column data types.

This article compares installing MySQL on Linux directly versus using Podman containers, with/without phpMyAdmin. It details installation steps for each method, emphasizing Podman's advantages in isolation, portability, and reproducibility, but also

This article provides a comprehensive overview of SQLite, a self-contained, serverless relational database. It details SQLite's advantages (simplicity, portability, ease of use) and disadvantages (concurrency limitations, scalability challenges). C

This guide demonstrates installing and managing multiple MySQL versions on macOS using Homebrew. It emphasizes using Homebrew to isolate installations, preventing conflicts. The article details installation, starting/stopping services, and best pra

Article discusses configuring SSL/TLS encryption for MySQL, including certificate generation and verification. Main issue is using self-signed certificates' security implications.[Character count: 159]

Article discusses popular MySQL GUI tools like MySQL Workbench and phpMyAdmin, comparing their features and suitability for beginners and advanced users.[159 characters]


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

SublimeText3 English version
Recommended: Win version, supports code prompts!

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)
