Which of the following is more efficient for passing PHP function parameters by value or by reference? Pass by value
I assigned a long article to the variable $ t, and then
1. First to explain the noun.In the process of value passing (passl-by-value), the formal parameters of the called function are treated as local variables of the called function, that is, the memory space is opened up in the stack to hold the value
Php variable reference pass value detailed tutorial. The reference in PHP means that different names access the same variable content. the pointer is different from the pointer in C language. the pointer in C language stores the variable content in
In memory, the copy of the PHP simple variable is passed by value, and the copy of the array and object is passed by reference, which is implemented by reference.Simple variables and objects are well understood:PHP//copy of a simple variable$a= '
PHP references and PHP references. PHP reference details, PHP reference details reference what is referenced in PHP means that different names are used to access the same variable content. This is not like the pointer of C. Instead, the reference is
In-depth analysis of PHP references (& amp;), in-depth analysis of php references. In-depth analysis of PHP references (lt; php $ a, which means that $ a and $ B point to the same variable. Note: $ a and $ B are exactly the same here. this doesn't
: This article mainly introduces php programming notes. if you are interested in PHP tutorials, please refer to them. Three methods for php to obtain POST data
Php image watermarking source code
Php + ajax + json is the simplest example.
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