php cannot see html

PHP is a commonly used server-side programming language for developing dynamic web pages, while HTML is the basic structural language of web pages. In web development, there is often a problem that PHP cannot see HTML. Today we will discuss the causes and solutions to this problem.

1. Cause of the problem

1. Wrong file suffix

For developing web pages, common file suffixes are .php and .html. Among them, .php files can contain HTML code. If the file extension is wrong when writing code in PHP, the HTML code will not be displayed when the file is accessed in the browser.

Solution: Check whether the file extension meets the requirements and make sure to use a .php or .html file extension.

2. PHP does not output the HTML code correctly

When the HTML code is not output correctly in the code of the PHP file, PHP cannot see the HTML. This is usually caused by the PHP code not running correctly or the running result not outputting HTML code.

Solution: Check whether the running results of the PHP code are correct and ensure that the HTML code is output correctly.

3. Incorrect settings in the PHP.ini file

In the PHP configuration file php.ini, there is a parameter called display_errors, and its default value is Off. If this parameter is set incorrectly, PHP will not be able to correctly output HTML code.

Solution: Edit the PHP configuration file php.ini and modify the value of the display_errors parameter to On.

2. Solution

1. Modify the file suffix

As mentioned above, the wrong file suffix may cause PHP to not see HTML. If it is determined that the file contains HTML code, just modify the file suffix name.

2. Correctly output HTML code in PHP code

In order to ensure that PHP can correctly output HTML code, we need to use the echo or print function in PHP code to output HTML code.

For example, the following code will output an HTML paragraph containing "Hello World!":

echo "
Hello World!
";

?>
 
Check the configuration in the PHP.ini file

In the PHP configuration file php.ini, make sure the display_errors parameter value is On. If you cannot modify the PHP configuration file, you can try adding the following statement to the code: 
ini_set('display_errors', 1);
This way, error messages can be output when PHP runs errors. Help us pinpoint the problem. 
3. Summary
PHP cannot see HTML. This problem is usually caused by the file extension, the HTML code is not output correctly in the PHP code, or the settings in the PHP.ini file are incorrect. In order to avoid this problem, we need to pay attention to the correct setting of the file extension when developing web pages, ensure that the PHP code can correctly output HTML code, and check whether the configuration in the PHP.ini file is correct if necessary. 
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