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How to get sql query results in php

PHP is a widely used web development language that can be integrated with the MySQL database to retrieve, modify, update and delete data through SQL query language. In PHP, getting the results of a SQL query is very important because you can determine whether the execution of the script was successful and what our next actions will be. This article will introduce how to get SQL query results in PHP. We will discuss the following aspects: 1. Establish a connection with the database 2. Set up the SQL query statement 3. Execute the SQL query 4. Process the query results 1

May 28, 2023 pm 07:05 PM

Windows php error log

When using PHP to develop websites or applications, it is inevitable to encounter errors sometimes. In order to find errors and fix them, when developing PHP, we can turn on the error log function to view error information. This article will introduce how to enable php error logs in Windows environment. 1. Open the php.ini file. First, find the directory where the php.ini file is stored, usually in the directory of an integrated development environment such as xampp or wamp. Search for the php.ini file in this folder and open it with a text editor. 2. Configure php

May 28, 2023 pm 06:57 PM

PHP record addition, deletion and modification

With the development of the Internet, web applications have become a part of modern life. As one of the most popular Web programming languages, PHP plays an important role in Web development. In many web applications, adding, deleting, modifying, and querying data is one of the most commonly used functions. Therefore, this article will introduce some basic methods of adding, deleting and modifying PHP records. 1. Adding records 1. Insert records into the MySQL database In PHP, you can use the following functions to insert records into the MySQL database. ```mysqli_query($co

May 28, 2023 pm 06:28 PM

php remove https

With the rapid development of the Internet, https has gradually become the mainstream network connection method. Because it can provide users with more secure data transmission and protection against eavesdropping. However, for some specific development scenarios, it may be necessary to remove https in PHP. This article will detail how to achieve this requirement. 1. What is https? HTTPS stands for Hyper Text Transfer Protocol Secure, which is the secure form of HTTP. Widely used in applications with relatively high safety requirements

May 28, 2023 pm 06:27 PM

php click to open a new page to jump

In website development, sometimes it is necessary to open a new page to jump when a button or link is clicked. It is very simple to implement this function using PHP language. Next, we will illustrate with a simple example. First, add a button or link in the HTML code and add an id attribute to it. Here we take "btn" as an example: ````<button id="btn">Click to open a new page</button>`` `Next, listen to the click event of this button in the PHP code, as shown below:

May 28, 2023 pm 06:26 PM

PHP multi-dimensional array removal and taking a group

PHP is a very powerful programming language that can be used to develop various types of web applications. Multidimensional arrays in PHP are a very common data structure that allow developers to easily process and manage large amounts of complex data. In actual development, we usually need to extract a subarray from a multidimensional array and convert it into a one-dimensional array. This usually requires the use of some array operations and PHP functions. This article will introduce how to remove a set of data from a multi-dimensional array in PHP, that is, extract a specified sub-array from a multi-dimensional array and add

May 28, 2023 pm 06:24 PM

Convert php csv to excel format file format

With the generation and transmission of large amounts of data in various industries, files in CSV format have great advantages in data storage and processing. However, CSV file is not a user-friendly format as it is just a simple text file format and does not provide the functionality of complex operations such as running functions. Therefore, converting CSV files to Excel format files will be more convenient for data use. In PHP, we can use the PHPExcel library to convert CSV files to Excel format files. PHPExcel is a tool specifically designed for PHP development

May 28, 2023 pm 06:15 PM

php cgi difference

PHP is a widely used server-side scripting language used for web development and dynamic page generation. It can run as a CGI (Common Gateway Interface) application or as a module such as the Apache HTTP server. CGI (Common Gateway Interface) is a common standard for connecting web servers and web applications. It allows the web server to send requests to web applications and receive responses. Among them, PHP CGI refers to the use of CGI standard protocol to connect the PHP interpreter and the Web server.

May 28, 2023 pm 06:11 PM

PHP implements Sina Weibo login

In the current social Internet environment, Sina Weibo has become an indispensable part of people's social life. As a developer, implementing the Sina Weibo login function in your own website or application can help improve user experience and enhance user stickiness. As a language that is easy to learn and has high development efficiency, PHP can also easily handle Sina Weibo login. Sina Weibo login relies on the OAuth2.0 authorization mechanism, which is an open authorization protocol currently used by most social platforms. When logging in to Sina Weibo, users need to first

May 28, 2023 pm 06:05 PM

php xml remove spaces

XML is a commonly used data exchange format. In PHP, we often use DOM or SimpleXML to parse and generate XML files. However, various problems will be encountered in the process of processing XML files, one of which is that the XML file contains spaces. Even though these spaces appear to be harmless, when parsing the XML file, they are treated as part of the node, causing some errors. In this article, we will explain how to remove spaces from XML files in PHP. 1. Use trim() function to remove XML text

May 28, 2023 pm 06:05 PM

html5 to php conversion

HTML5 and PHP are two different programming languages. HTML5 is mainly used for the presentation, layout and style of web pages, while PHP is mainly used for server-side data processing and generation of dynamic web pages. However, in the actual development process, HTML5 and PHP are usually used together because they work well together to implement various functions. In this article, we will explore how to convert HTML5 code to PHP code in order to implement more complex applications. We'll start with a simple example. The difference between HTML5 and PHPHT

May 28, 2023 pm 05:56 PM

Usage of php function find

In the development of PHP, there are many commonly used functions that can help us quickly complete some operations. One of the commonly used functions is the find function. The purpose of this function is to find specific characters or substrings in a string. This article will introduce in detail the usage of php function find. 1. Basic syntax The basic syntax of the find function is very simple. You only need to call the function in a string and pass the character or substring you want to find as a parameter. For example: ```$string = "Hello World!";$find

May 28, 2023 pm 05:52 PM

php jsonp converts json data

With the rapid development of mobile Internet, more and more websites are beginning to use Web API to provide data services. When we use Web API to obtain data on the front end, we usually use AJAX to make asynchronous requests. However, due to the browser's same-origin policy restrictions, AJAX can only request data from the same-origin server, which limits the scope of the front-end's ability to obtain data. In order to solve cross-domain problems, jsonP technology came into being. Let's learn more about the application of jsonP in front-end data acquisition. 1. JSONP Principle JSONP (J

May 28, 2023 pm 05:50 PM

php changes words from lowercase to uppercase

In PHP development, we often encounter the need to convert words in text to uppercase and lowercase. One common scenario is to convert words from lowercase to uppercase. This article will introduce two common methods in PHP to convert words from lowercase to uppercase. Method 1: strtoupper()PHP built-in function `strtoupper()` can convert all lowercase letters in the string to uppercase letters, and it is very simple to use. Here is an example: ```$originalString

May 28, 2023 pm 05:46 PM