1, can local variables and global variable duplicate?
A: Yes, the local will screen the overall situation. To use a global variable, you need to use the "::"
Local variables can have the same name as global variables, and when referenced within a
PHP reference (&) variable reference, function reference, object reference and parameter reference using PHP reference (just precede the variable or function, object, etc. with the & symbol)The reference in PHP means: Different names access the same
Php Reference & Usage Analysis [variable reference, function reference, object reference], php reference
This article analyzes the reference & Usage in php. We will share this with you for your reference. The details are as follows:
Php references
Analysis of variable reference and variable destruction mechanism in PHP, PHP destruction
This paper analyzes the variable reference and the mechanism of variable destruction in PHP. Share to everyone for your reference. The specific analysis is as
PHP references (add & symbols before variables or functions, objects, etc.)The reference in PHP means: Different names access the same variable content.There is a difference between the pointers in the C language. In the C language, the pointer
The example of this article analyzes the usage of reference & in PHP. Share to everyone for your reference, specific as follows:
PHP references (that is, precede variables or functions, objects, etc. & symbols)//The most important thing is to
Real understanding of referencing & in PHP-variable reference, function reference, object referencePHP references (that is, the variables or functions, objects, etc. with the & symbol)//The most important is to delete the referenced variable, but
In this paper, we analyze the mechanism of variable reference and variable destruction in PHP. Share to everyone for your reference. The specific analysis is as follows:
Variable is a very important type in PHP, we have data through variables or
Definition and initialization of C + + struct type
It is sometimes necessary to combine different types of data into an organic whole for easy user use. The data of these combinations in a whole are interrelated. For example, a student's number,
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