How to make a "reference" to an array by string in php
What References Are Not, References Explained , Predefined Interfaces and Classes
Another example of something to watch out for when using references with arrays.It seems that even an usused reference to an array cell modifies the * source * of the reference.Strange behavior for an assignment statement(is this why I 've seen it written as an =& operator? - although this doesn' t happen with regular variables). < ? php $array1 = array(1, 2); $x = & $array1; // Unused reference $array2 = $array1; // reference now also applies to $array2 ! $array2=22; // (changing  will not affect $array1) print_r($array1);?>Produces: Array (  => 1  => 22 // var_dump() will show the & here )I fixed my bug by rewriting the code without references, but it can also be fixed with the unset() function:<?php $array1 = array(1,2); $x = &$array1; $array2 = $array1; unset($x); // Array copy is now unaffected by above reference $array2=22; print_r($array1);?>Produces: Array (  => 1  => 2 )
How can I make those messages disappear? Because the entire code is working(I get the desired output).,Connect and share knowledge within a single location that is structured and easy to search., Reconnecting with a previous professor then asking right away for a reference letter , Can you see the shadow of a spaceship on the Moon while looking towards the Earth?
You are passing the result of a function call as an argument. You aren't passing a variable.
$vars = get_defined_vars(); echo var_name($a, $vars);
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