Introduction to PHP Str_pad function usage _php tips

Grammar
Str_pad (String,length,pad_string,pad_type)
Parameter description
String required. Specify the string to be populated.
Length required. Specify the length of the new string. If the value is less than the length of the original string, no action is made.
Pad_string Optional. A string that is specified for use in padding. Default is blank.
Pad_type Optional. Specify the side of the padding string.
Possible values:
Str_pad_both-fills the ends of the string. If it is not an even number, an extra padding is obtained on the right.
Str_pad_left-fills to the left of the string.
Str_pad_right-fills to the right of the string. This is the default.

Example 1
<?PHP$STR = "Hello world"; Echo Str_pad ($str, 20, ".");? > Output:
Hello world ....
Example 2
<?PHP$STR = "Hello world"; Echo Str_pad ($str, ".", Str_pad_left);? > Output:
......... Hello World
Example 3
<?PHP$STR = "Hello world"; Echo Str_pad ($str, ".:", Str_pad_both);? > Output:
.:.: Hello World.:.:.