What does addcslashes() do in php?
The addcslashes() function in PHP adds backslashes to specified characters in a string. Here’s the basic syntax of the addcslashes() function:
addcslashes(string $string, string $charlist): string
The first argument, $string, is the string to be modified. The second argument, $charlist, is a string containing the characters that should be escaped with backslashes. The function returns the modified string. For example, if you want to escape all occurrences of the characters \ (backslash), ‘ (single quote), and ” (double quote) in a string, you can use addcslashes() like this:
$string = "This is a string with 'single quotes' and \"double quotes\"."; $escaped_string = addcslashes($string, '\'"'); echo $escaped_string;
The output of this code would be:
This is a string with \'single quotes\' and \"double quotes\".
As you can see, addcslashes() has added backslashes to all occurrences of the characters \, ‘, and ” in the string. This function can be useful when you need to escape certain characters in a string to prevent them from causing problems in contexts like SQL queries, HTML output, or command-line arguments.