(PHP 4 >= 4.3.0, PHP 5, PHP 7) Formats a number as a currency string
(PHP 4, PHP 5, PHP 7) Make a string lowercase
(PHP 5, PHP 7) Find the position of the last occurrence of a case-insensitive substring in a string
(PHP 4 >= 4.0.5, PHP 5, PHP 7) Get numeric formatting information
(PHP 4, PHP 5, PHP 7) Return part of a string
(PHP 4, PHP 5, PHP 7) Output a string int print
(PHP 4, PHP 5, PHP 7) Find the first occurrence of a string
(PHP 4, PHP 5, PHP 7) Finds the length of the initial segment of a string consisting entirely of characters
(PHP 5 >= 5.3.0, PHP 7) Parse a CSV string into an array
(PHP 4, PHP 5, PHP 7) Return information about characters used in a string
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