strlen() function
—The strlen() function returns the length of a string, in characters.
—The strlen() function returns the length of a string, in characters.
strtolower() Function
The strtolower() function converts a string to lowercase.
Strtoupper() Function
The strtoupper() function converts a string to uppercase.
ucwords() Function
—The ucwords() function converts
the first character of each word in a string to uppercase.
Ucfirst() Function
The ucfirst() function converts the first character of a string to
uppercase.
implode() Function
—The implode()
function returns a string from the elements of an array.
Syntax:
implode(separator,array)
explode() Function
—The explode()
function breaks a string into an array.
Note: The "separator" parameter cannot be an
empty string.
Syntax:
—explode(separator,string)
htmlentities()
—The htmlentities() function converts
characters to HTML entities.
htmlspecialchars() Function
The htmlspecialchars() function converts some predefined characters to HTML
entities.
The predefined characters are:
& (ampersand)
becomes &
" (double quote)
becomes "
' (single quote)
becomes '
< (less than)
becomes <
> (greater than)
becomes >
md5() Function
—It is used for
securing any data.
strcmp() Function:
The strcmp() function compares two strings.
Syntax:
strcmp(string1,string2);
