[valid_routingnumber]
| Link | valid_routingnumber |
| Author | Justin Dennis |
| Category | Custom Tag |
| Version | 8.5.x |
| License | Public Domain |
| Posted | 12 Apr 2013 |
| Updated | 12 Apr 2013 |
| More by this author... | |
Description
Validate bank routing number using ABA check digit algorithm.
Sample Usage
valid_routingnumber('123123123');
->false
valid_routingnumber('063000047');
->true
Source Code
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define_tag('valid_routingnumber', -required='routingnumber');
local( 'digits' = #routingnumber->split(''),
'multiplicands' = array(3,7,1,3,7,1,3,7),
'checksum' = integer,
'minuend' = integer,
'checkdigit' = integer);
var('test' = null);
if(#digits->size != 9);
return(false);
/if;
loop(8);
#checksum += integer(#digits->get(loop_count)) * #multiplicands->get(loop_count);
/loop;
#minuend = math_ceil(#checksum/10.0)*10;
#checkdigit = #minuend - #checksum;
if(#digits->get(9) == #checkdigit);
return(true);
else;
return(false);
/if;
/define_tag;
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