(PHP 4 >= 4.0.5, PHP 5, PHP 7) Locale based string comparison

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Return information about words used in a string

(PHP 4, PHP 5, PHP 7) Return a formatted string

(PHP 4, PHP 5, PHP 7) Calculate the md5 hash of a string

(PHP 4, PHP 5, PHP 7) Binary safe string comparison

Examples: Use of this modifier is discouraged, as it can easily introduce security vulnerabilites:

(PHP 5, PHP 7) Convert a string to an array array

(PHP 4 >= 4.0.1, PHP 5, PHP 7) Calculates the crc32 polynomial of a string

(PHP 4, PHP 5, PHP 7) Quote string with slashes in a C style

(PHP 4, PHP 5, PHP 7) Un-quotes a quoted string