In this category, you will find a collection of functions specifically designed for string manipulation and processing in PHP.

  • Online strlen() function
    This function determines the length of a string. It returns the number of characters in the string. This is particularly useful when you need to check the length of user input or set a maximum length for certain fields.
  • Online strrev() function
    This function reverses a string and returns it in reverse order. This can be useful for performing certain string operations or simply to analyze and modify a string.
  • Online strtolower() function
    This function converts all the letters in a string to lowercase. This is helpful to display or compare text uniformly in lowercase.
  • Online strtoupper() function
    This function converts all the letters in a string to uppercase. This is useful when you want to display or compare text uniformly in uppercase.
  • Online trim() function
    This function removes whitespace (or other predefined characters) from the beginning and end of a string. This is helpful to clean up user input and ensure that no unwanted spaces are present in the data.
  • Online addslashes() function
    This function adds backslashes (\) before characters like single quotes ('), double quotes ("), and the NULL byte. This is particularly useful to secure strings for use in database queries or for output in HTML.
  • Online stripslashes() function
    This function removes backslashes (\) from a string. This is useful when processing strings that have been escaped with addslashes(), especially when handling data from a database or a form.
  • Online nl2br() function
    This function inserts an HTML line break (<br>) at every line break (\n) in a string. This is particularly useful when you want to display text with line breaks on a webpage, as HTML ignores line breaks by default.
  • Online strip_tags() function
    This function removes HTML and PHP tags from a string. This is helpful to clean up user input and ensure that no malicious scripts or unwanted HTML tags are present in the data.