array analysis

code

<?php
/**
 * Created by deshengkong.
 * Date: 14/12/23
 * Time: 下午8:07
 */

echo &#39;PHP version:&#39;. phpversion() . PHP_EOL;

$arr2 = array(
    1 => 'giraffe',
    '2' => 'panda',
    9223372036854775806 => 'bird',
    '9223372036854775807' => 'deer',
    '9223372036854775808' => 'pig'
);

echo 'PHP_INT_MAX:' . PHP_INT_MAX . PHP_EOL;
var_dump($arr2);

result

PHP version:5.6.2
PHP_INT_MAX:9223372036854775807
array(5) {
  [1] =>
  string(7) "giraffe"
  [2] =>
  string(5) "panda"
  [9223372036854775806] =>
  string(4) "bird"
  [9223372036854775807] =>
  string(4) "deer"
  '9223372036854775808' =>
  string(3) "pig"
}

conclusion

In array, when values ​​like '12345', '9894321', '9223372036854775807' are used as keys,

when its value is less than Equal to PHP_INT_MAX, press both Numeric processing;

When its value is greater than PHP_INT_MAX, it is processed as string;

The above has introduced array parsing, including aspects of it. I hope it will be helpful to friends who are interested in PHP tutorials.