Home Database Mysql Tutorial Why Does `mysqli_fetch_array()` Return \'mysqli_result Required, boolean given\'?

Why Does `mysqli_fetch_array()` Return \'mysqli_result Required, boolean given\'?

Dec 01, 2024 pm 04:34 PM

Why Does `mysqli_fetch_array()` Return

mysqli_fetch_array() Parameter Mismatch: mysqli_result Required

When executing the following code, you may encounter the error "mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given":

$check1_task = "SELECT * FROM `users` WHERE `fb_id` = " . $fb_id . " LIMIT 0, 30 ";
$check1_res = mysqli_query($con, $check1_task);
Copy after login

This error occurs because mysqli_fetch_array() expects a valid mysqli_result as its first parameter, which is the result of a successful query execution. However, in the given code, mysqli_query() is not returning a mysqli_result.

To resolve this issue, check the return value of mysqli_query(). If it returns false, the query failed and you need to investigate the cause using mysqli_error():

if (!$check1_res) {
    trigger_error(mysqli_error($con), E_USER_ERROR);
}
Copy after login

By doing so, you can determine the actual reason for the query failure and address it accordingly. Remember that mysqli_fetch_array() can only be used on a valid mysqli_result, so ensure that the query executes successfully first.

The above is the detailed content of Why Does `mysqli_fetch_array()` Return \'mysqli_result Required, boolean given\'?. For more information, please follow other related articles on the PHP Chinese website!

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot Article Tags

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Reduce the use of MySQL memory in Docker Reduce the use of MySQL memory in Docker Mar 04, 2025 pm 03:52 PM

Reduce the use of MySQL memory in Docker

How do you alter a table in MySQL using the ALTER TABLE statement? How do you alter a table in MySQL using the ALTER TABLE statement? Mar 19, 2025 pm 03:51 PM

How do you alter a table in MySQL using the ALTER TABLE statement?

How to solve the problem of mysql cannot open shared library How to solve the problem of mysql cannot open shared library Mar 04, 2025 pm 04:01 PM

How to solve the problem of mysql cannot open shared library

What is SQLite? Comprehensive overview What is SQLite? Comprehensive overview Mar 04, 2025 pm 03:55 PM

What is SQLite? Comprehensive overview

Run MySQl in Linux (with/without podman container with phpmyadmin) Run MySQl in Linux (with/without podman container with phpmyadmin) Mar 04, 2025 pm 03:54 PM

Run MySQl in Linux (with/without podman container with phpmyadmin)

Running multiple MySQL versions on MacOS: A step-by-step guide Running multiple MySQL versions on MacOS: A step-by-step guide Mar 04, 2025 pm 03:49 PM

Running multiple MySQL versions on MacOS: A step-by-step guide

What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)? What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)? Mar 21, 2025 pm 06:28 PM

What are some popular MySQL GUI tools (e.g., MySQL Workbench, phpMyAdmin)?

How do I configure SSL/TLS encryption for MySQL connections? How do I configure SSL/TLS encryption for MySQL connections? Mar 18, 2025 pm 12:01 PM

How do I configure SSL/TLS encryption for MySQL connections?

See all articles