These functions all manipulate strings in various ways. Some more specialized sections can be found in the regular expression and URL handling sections.
For information on how strings behave, especially with regard to usage of single quotes, double quotes, and escape sequences, see the Strings entry in the Types section of the manual.
要編譯本擴充功能無需外部函式庫。
本擴充功能作為 PHP 核心的一部分,無需安裝即可使用。
以下常數由擴充功能定義,因此只有在擴充功能被編譯到 PHP 中,或者在執行時被動態載入後才有效。
For even more powerful string handling and manipulating functions take a look at the POSIX regular expression functions and the Perl compatible regular expression functions.