(PHP 4, PHP 5, PHP 7) Quote meta characters string
(PHP 5, PHP 7) Search a string for any of a set of characters
(PHP 4, PHP 5, PHP 7) Translate characters or replace substrings
(PHP 5, PHP 7) Find the position of the first occurrence of a case-insensitive substring in a string
(PHP 4, PHP 5, PHP 7) String comparisons using a "natural order" algorithm
(PHP 4, PHP 5, PHP 7) Count the number of substring occurrences
(PHP 4, PHP 5, PHP 7) Output one or more strings
(PHP 4, PHP 5, PHP 7) Make a string's first character uppercase
(PHP 4, PHP 5, PHP 7) Return a formatted string
(PHP 5, PHP 7) Binary safe comparison of two strings from an offset, up to length characters
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