Remove Non Printable Characters from String in PHP
What are Non Printable Characters?
When working with strings in PHP, you may encounter non printable characters that can cause issues with your code. Non printable characters are characters that are not visible on the screen, such as newline characters, tab characters, and control characters. These characters can be problematic when working with strings, especially when trying to compare or manipulate them.
Non printable characters can be introduced into your strings through various means, such as user input, file uploads, or database queries. It is essential to remove these characters to ensure that your strings are clean and consistent. PHP provides several functions that can help you remove non printable characters from strings, including the preg_replace() function and the str_replace() function.
Removing Non Printable Characters with PHP
What are Non Printable Characters? Non printable characters are characters that have an ASCII value between 0 and 31, or 127. These characters are not visible on the screen and can cause issues with your code. Some examples of non printable characters include the newline character (\n), the tab character (\t), and the carriage return character (\r).
Removing Non Printable Characters with PHP To remove non printable characters from a string in PHP, you can use the preg_replace() function. This function uses regular expressions to replace non printable characters with an empty string. For example, you can use the following code: $clean_string = preg_replace('/[^\x20-\x7E]/', '', $dirty_string); This code will remove all non printable characters from the $dirty_string variable and store the result in the $clean_string variable.