PHP Reference & symbol

I generally don't need to use php reference symbols when writing code. First of all, I don't know much about its usage. the C language is used to obtain the address, but PHP may be somewhat different, it is said to be a copy of the variable, that is, re-copy the same variable, such as $ a = & amp; $ B; then the variable a and variable B are complete... "/> <scripttype =" text/javascript "src =" http:

I generally don't need to use php reference symbols when writing code. First of all, I don't know much about its usage. the C language is used to obtain the address, but PHP may be somewhat different, it is said to be a copy of the variable, that is, re-copy the same variable, such

$ A = & $ B;

Then, variables a and B are completely equal, which is equivalent to $ a = $ B. is it necessary to write $ a = & $ B? This may also occupy more memory space.

 

Some people like to write it like this.

Function & f ($ arg1 ,..){

// Code body

}

In my opinion, writing in this way has no practical effect. Generally, the reference operators are written in the parameters of the function:

Function f (& $ x, & $ y ){

// The operations on $ x and $ y are assigned to $ x and $ y. if both $ x and $ y are returned outside the function;

// No return statement is required.

}

If function f is called, the calculated values of $ x and $ y can be obtained outside the function.

 

$ Total = array ();

$ Total_data = '';

F (& $ total, & $ total_data );

 

Echo $ total_data; // output the value of total_data after f function compute.

Var_dump ($ total); // The total value after f function calculation is output here.

 

These are my personal opinions. I hope you can correct them.