A case of using PHP custom function to implement array comparison function

This article mainly introduces the PHP custom function to implement the array comparison function, involving PHP's operation skills for array traversal, comparison, judgment and other related operations. Friends in need can refer to it

The examples of this article describe PHP Custom function implements array comparison function. Share it with everyone for your reference, the details are as follows:

<?php
 //数组使用标准比较运算符这样比较的
 function standard_array_compare($op1,$op2)
 {
 if(count($op1) < count($op2)) {
  return -1; //$op1 < $op2
 } else if(count($op1) > count($op1)) {
  return 1; //$op1 > op2
 }
 foreach ($op1 as $key => $val) {
  if(!array_key_exists($key,$op2)) {
  return null;
  } else if ($val < $op2[$key]) {
  return -1;
  } else if ($val > $op2[$key]) {
  return 1;
  }
 }
 return 0;
 }
 $arr1 = array(1,2,3,4,5);
 $arr2 = array(1,2,3,4,5);
 $arr3 = array(2,3,4,5,6);
 $arr4 = array(0,1,2,3,4);
 var_dump(standard_array_compare($arr1,$arr2));
 echo "<br/>";
 var_dump(standard_array_compare($arr1,$arr3));
 echo "<br/>";
 var_dump(standard_array_compare($arr1,$arr4));
?>

Running results:

int(0)
int(-1)
int(1)

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