CodePudding user response:
An invisible characters code value is 2CodePudding user response:
https://baike.baidu.com/item/Chr/580328? Fr=AladdinAnd the PHP CRH function description
CodePudding user response:
& 2 H2, hex,CRH (xx), returns the ASCII characters for xx
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CRH function
Returns a String that contains characters associated with the specified character code,
Syntax
CRH (charcode)
Necessary charcode argument is a Long used to identify a particular character,
Description
Number between 0 and 31 with the standard of the same print ASCII code, for example, CRH (10) can return newline characters, charcode normal range of 0-255, however, in a DBCS system, charcode actual in the range of 32768 to 65535,
Note ChrB function applied to the bytes of data contained in a String, always returns a single-byte ChrB, rather than return a character, a character may be one or two bytes, ChrW function returns a Unicode String, if on the platform does not support Unicode, is its function the same as the function of CRH,
Hex function
Return on behalf of hexadecimal numeric String,
Syntax
Hex (number)
Number of necessary parameters for numerical expression or any valid string expression,
Description
If the number is not an integer, so before the execution will be rounded to the nearest integer,
If the number is income in
Null Null
The Empty zero (0)
Any other Numbers up to eight hexadecimal character,
Appropriate within the scope of digital, prefix to & amp; H, can be directly said hexadecimal digits, for example, the hexadecimal notation & amp; H10 represent decimal 16,
CodePudding user response:
Ha ha, the upstairs are right, this also stick a q?
To do with the identification number?