Instance
Reverse display of Hebrew characters:
Definition and usage
The Hebrev () function converts a right-to-left stream of Hebrew text to a left-to-right stream.
Tip: Hebrev () and HEBREVC () can convert Hebrew logical text (Windows encoding) to
Math function:
10 of the more commonly used red.
abs-Absolute Valueacos-Inverse cosineacosh-Inverse hyperbolic cosineasin-anyway Chordasinh-Inverse hyperbolic sineatan2-two parameters of the inverse tangentatan-anyway cutatanh-Inverse hyperbolic
Character Set base character set: A character set in a database contains two meanings
A collection of various text and symbols, including national text, punctuation, graphic symbols, numbers, etc.
The encoding of characters, that is,
I. Variable naming rules 1. Variable names can only be letters, numbers, Any combination of underscores 2. Variable names cannot begin with a number 3. Some reserved fields cannot be used as custom variable names 4 variable names need to have a
These are functions that handle strings in a variety of ways. There are also special chapters in the regular expressions and URL processing sections.
See string entries for information on how strings work, especially about single quotes, double
Math Function:10 commonly used red labels.
Abs-absolute valueAcos-arccosineAcossh-inverse hyperbolic cosineAsin-arcsinAsinh-inverse hyperbolic sineAtan2-arc tangent of Two ParametersAtan-arc tangentAtanh-antihyperbolic tangentBase_convert-convert a
PHP Learning Series (1)--String processing function (4), PHP function
16. The HEBREVC () function converts a right-to-left stream of Hebrew text to a left-to-right stream. It will also convert the new line (\ n) to。 Only ASCII characters between 224
PHP extension text processing-string and string functions are all string functions processed in various ways. There are also some special chapters in the regular expression and URL processing sections.
For more information about the operating
addcslashes-using backslashes to escape characters in a string in C language style
addslashes-referencing strings with backslashes
bin2hex-converts binary data to hexadecimal notation
Aliases for Chop-rtrim
chr-returns the
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