Dubz

01-22-2012, 09:25 PM

I have a giant array of 9 digit numbers (about 6300). I want to perform a check that takes each number and flips it and sees which still match (perfect mirror) and which are close to a perfect match (one digit is off by 1-2 increments)

so far this is a shortened down version of what i attempted but failed:

<?php

$numberArray = array(

123456789,

234567890,

123456543,

624352454,

123454322, //Should be a possible close match, only of by one incrememnt (first/last digit)

318454813, //Should be a perfect match

829034505

);

$count = 0;

foreach($numberArray as $number){

$number2 = strrev($number);//Flip the number

$newNumber1 = array(

$id+1,

$id+10,

$id+100,

$id+1000,

$id+10000,

$id+100000,

$id+1000000,

$id+10000000,

$id+100000000,

$id-1,

$id-10,

$id-100,

$id-1000,

$id-10000,

$id-100000,

$id-1000000,

$id-10000000,

$id-100000000

);

$newNumber2 = array(

$id+2,

$id+20,

$id+200,

$id+2000,

$id+20000,

$id+200000,

$id+2000000,

$id+20000000,

$id+200000000,

$id-2,

$id-20,

$id-200,

$id-2000,

$id-20000,

$id-200000,

$id-2000000,

$id-20000000,

$id-200000000

);

if($number==$number2 || in_array($id2,$newNumber1) || in_array($id2,$newNumber2)){

print $id."<br />\r\n";

$count++;

}

}

print $count." numbers's are closely mirrored";

I got the perfect mirror check to work but the 1-2 increment's off check wont work. Also if you have an easier way to check if its off by 1 or 2 increments that would be nice also.

so far this is a shortened down version of what i attempted but failed:

<?php

$numberArray = array(

123456789,

234567890,

123456543,

624352454,

123454322, //Should be a possible close match, only of by one incrememnt (first/last digit)

318454813, //Should be a perfect match

829034505

);

$count = 0;

foreach($numberArray as $number){

$number2 = strrev($number);//Flip the number

$newNumber1 = array(

$id+1,

$id+10,

$id+100,

$id+1000,

$id+10000,

$id+100000,

$id+1000000,

$id+10000000,

$id+100000000,

$id-1,

$id-10,

$id-100,

$id-1000,

$id-10000,

$id-100000,

$id-1000000,

$id-10000000,

$id-100000000

);

$newNumber2 = array(

$id+2,

$id+20,

$id+200,

$id+2000,

$id+20000,

$id+200000,

$id+2000000,

$id+20000000,

$id+200000000,

$id-2,

$id-20,

$id-200,

$id-2000,

$id-20000,

$id-200000,

$id-2000000,

$id-20000000,

$id-200000000

);

if($number==$number2 || in_array($id2,$newNumber1) || in_array($id2,$newNumber2)){

print $id."<br />\r\n";

$count++;

}

}

print $count." numbers's are closely mirrored";

I got the perfect mirror check to work but the 1-2 increment's off check wont work. Also if you have an easier way to check if its off by 1 or 2 increments that would be nice also.