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How to solve the problem that the php database hobby cannot be displayed

The solution to the PHP database hobby not being displayed is: 1. Code to test whether the database connection is successful; 2. Ensure that the data is correctly retrieved from the database and that the row contains the "hobby" field; 3. Check that "hobby" is referenced in the PHP code ” field; 4. Make sure the variable is rendered into HTML output correctly and without any errors.

Jun 19, 2023 am 10:24 AM

php

Can php define methods?

PHP can define methods. The operation is as follows: 1. Create a PHP sample file; 2. Use the "function" keyword to declare a function; 3. Write function parameters in parentheses "()" and curly brackets "{} "Write the function body in "; 4. Customize the function name according to the naming rules.

Jun 19, 2023 am 10:19 AM

php

Is there any way to write php files online?

There are tools and websites for writing PHP files online. The advantages are: 1. You can start writing and testing code immediately without installing any software or configuring the environment; 2. You can easily share the code with other people, and you only need to provide a link to view it. and edit code; 3. You can try new ideas quickly and easily without spending a lot of time setting up a development environment; 4. For entry-level PHP programmers, it provides an ideal place to learn programming basics and syntax.

Jun 19, 2023 am 10:11 AM

php

Does php interact with mysql need to be escaped?

PHP needs to be escaped when interacting with MySQL, because some characters such as single quotes, double quotes and backslashes have special meanings in SQL statements. In order to avoid these characters being misunderstood, they need to be escaped and at the same time to avoid SQL injection attacks. Prevent attackers from executing malicious SQL code to change application behavior, such as deleting data, obtaining confidential information, etc.

Jun 19, 2023 am 09:57 AM

php

How to solve the problem of garbled file names displayed in PHP

The solution to the garbled file name displayed in PHP is: 1. Use the editor to change the file encoding to an encoding consistent with the system environment; 2. Specify the correct file name encoding through the PHP "iconv()" function; 3. Modify the default encoding of the server To be consistent with the file encoding.

Jun 19, 2023 am 09:48 AM

php

How to achieve likes on multiple articles in php

The method to achieve likes for multiple articles in PHP is: 1. Create a database table "articles" to store article information and the number of likes; 2. Display the articles and like buttons on the article page, and combine them with the articles in the database Records are associated; 3. After the user clicks the "Like" button, the like record is stored in the database.

Jun 19, 2023 am 09:29 AM

php

How to turn off pseudo-static code in php

The method for turning off pseudo-static code in PHP is: 1. Use a text editor to open the ".htaccess" file in the root directory of the website and find the line containing the pseudo-static code in the file; 2. Change "RewriteEngine On" in the code Change it to "RewriteEngine Off"; 3. In the PHP configuration file "php.ini", change the "cgi.fix_pathinfo" value to 0.

Jun 16, 2023 pm 05:53 PM

php

How to solve the problem that there is no extension in ubuntuPHP configuration

The solution for ubuntuPHP configuration without extension is: 1. Open the terminal and run the command "sudo apt-get update" to ensure that the latest extension is downloaded; 2. Run the command "sudo apt-cache search php-" to list all available PHP extensions. Select the extension you need; 3. Run the command "sudo apt-get install <extension name>" to install the extension; 4. After completing the installation, restart the Apache server.

Jun 16, 2023 pm 05:29 PM

php Ubuntu

Does a php array contain two objects?

The PHP array contains two objects. This can better organize and manage the data. According to the specific needs, you can choose two different ways to achieve this goal. One is to contain objects in the array, and the other is Regardless of the object array method used, attention must be paid to the rationality of program design and the readability of the code.

Jun 16, 2023 pm 05:10 PM

php 对象

How to change variable storage type in php

The method of changing the storage type of variables in PHP is: 1. Forced type conversion, using a function to convert a variable of one type to another type, such as the "(int)" function to convert a string into an integer; 2. Automatic type conversion, in When calculating two different types of values, PHP will automatically convert them to the same type; 3. Using the "settype()" function, you can set the variable to the specified type, but it can only be used for PHP native data types.

Jun 16, 2023 pm 04:47 PM

php

What server should I use if php only provides interfaces?

PHP applications only provide API interfaces, so you can use any server that supports web servers and can run PHP interpreters, including but not limited to "Apache HTTP Server", "Nginx", "Lighttpd", etc., with high reliability and scalability performance, security, and support for multiple protocols.

Jun 16, 2023 pm 04:36 PM

php

How to call methods in other classes in php class

The methods for calling other classes in the PHP class are: 1. Create a PHP sample file; 2. Create two classes, A and B; 3. In classA, use "$b = new B()" to instantiate B and Create a "$b" object; 3. Call the "someMethod()" method in class B through "$b->someMethod()".

Jun 16, 2023 pm 04:21 PM

php

What does => mean in php array

=> in a php array represents the connector between the array key name and the element. Simply put, the => symbol is used to separate keys and values. The left side represents the key and the right side represents the value.

Jun 16, 2023 pm 03:56 PM

php 数组

How to query the number of mysql data in php

The method for PHP to query the number of mysql data is: 1. Create a PHP sample file, use the "mysqli_connect()" function and establish a connection to the MySQL database; 2. After the connection is established, execute the SQL query statement to obtain the results and put the query into PHP code, and use the "mysqli_query()" function to send it to MySQL; 3. Use the `mysqli_fetch_array()` function to retrieve the actual results, and then close the MySQL connection.

Jun 16, 2023 pm 03:49 PM

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