PHP executes external commands with anti-apostrophe, PHP executes external commands
For example:
Echo ' WhoAmI ';
Export the database, the folder to be imported must have writable permission, the content after-u-p must be written next to each other
For example:
Echo ' WhoAmI ';
Export the database, the folder you want to import must have writable permissions, and the content after-u-p must be written next to it
The code is as follows:Echo ' mysqldump-h
For example:
Echo ' WhoAmI ';
Export the database, the folder you want to import must have writable permissions, and the content after-u-p must be written next to it
Copy Code code as follows:
Echo ' mysqldump-h
In the character set, one type of character has this feature: When this character is entered from the keyboard, the character can be displayed on the display, that is, what the input displays. This type of character is known as a display character,
2.5.1 Characters Constants Quantity
Word constants is a character enclosed in single quotes. such as ' A ', ' 9 ', '! '. Single quotation marks in the constants of characters do not represent the characters themselves. The characters in single
The US ASCII Character SetUS ASCII, ANSI x3.4-1986 (ISO 646 International Reference Version)Codes 0 through and 127 (decimal) are unprintable control characters.Code (decimal) is a nonprinting spacing character. Codes through 126 (decimal) is
All the escape characters and their corresponding meanings:
Escape character
Significance
ASCII code value (decimal)
\a
Bell (BEL)
007
\b
BACKSPACE (BS) to move the current position
Author Jason Orendorff GitHub home Page Https://github.com/jorendorffAnti-apostrophe (') basicsES6 introduces a new type of string literal syntax, which we call template strings. In addition to using the anti-apostrophe character ' instead of the
Escape character
Significance
ASCII code value (decimal)
\a
Bell (BEL)
007
\b
BACKSPACE (BS) to move the current position to the previous column
008
\f
Page Break (FF),
All the escape characters and their corresponding meanings:
Escape character
Significance
ASCII code value (decimal)
\a
Bell (BEL)
007
\b
BACKSPACE (BS) to move the current position
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