(PHP 4, PHP 5, PHP 7) Find the first occurrence of a string

(PHP 4, PHP 5, PHP 7) Find the position of the last occurrence of a substring in a string

(PHP 4, PHP 5, PHP 7) Binary safe case-insensitive string comparison

(PHP 5 >= 5.3.0, PHP 7) Convert a 8 bit string to a quoted-printable string

(PHP 5, PHP 7) Find the position of the last occurrence of a case-insensitive substring in a string

(PHP 4, PHP 5, PHP 7) Finds the length of the initial segment of a string consisting entirely of characters

(PHP 4, PHP 5, PHP 7) Format a number with grouped thousands

(PHP 4, PHP 5, PHP 7) Output a string int print

(PHP 4, PHP 5, PHP 7) Return part of a string

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Pad a string to a certain length with another string