PHP自定义函数实现数组比较功能示例

<?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));?>

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