How to get the name of an array in php

In PHP, you can get the name of the array in the following ways.

1. Use the variable name as the array name

When using the variable name as the array name, you can directly use the name of the variable to get the name of the array. For example:

$array = array('apple', 'banana', 'orange');
$name = 'array';
echo $name; // 输出：array

2. Use the get_defined_vars() function to get a list of all variables

The get_defined_vars() function can get a list of all variables defined in the current scope, including array variables. You can then iterate through the list, check if each variable is an array, and if so, get the name of the array. For example:

$array = array('apple', 'banana', 'orange');
$vars = get_defined_vars();
foreach ($vars as $name => $value) {
  if (is_array($value) && $value === $array) {
    echo $name; // 输出：array
  }
}

3. Use debug_backtrace() function to obtain function call stack information

debug_backtrace() function can obtain function call stack information, which includes the function name and function name of the current function parameters and other information. You can traverse the function call stack and check whether the parameter of each function is an array and the value of the array is equal to the target array. If so, get the name of the array. For example:

function getArrayName($array) {
  $trace = debug_backtrace();
  foreach ($trace as $item) {
    if (isset($item['args'][0]) && is_array($item['args'][0]) && $item['args'][0] === $array) {
      return $item['function'];
    }
  }
  return null;
}

$array = array('apple', 'banana', 'orange');
$name = getArrayName($array);
echo $name; // 输出：getArrayName

No matter which method is used, you can only get the name of the array defined in the current scope. If the array is defined in other scopes, you cannot get its name directly.

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