how to use php to loop through array to validate the value - php

Question

I have this array
array(6) {
[0]=>
string(7) "1234567"
[1]=>
string(5) "7548#"
[2]=>
string(9) "1254#abc#"
[3]=>
string(5) "32514"
[4]=>
string(6) "2548##"
[5]=>
string(5) "3258#"
}
I want to validate this data based on provided condition.
If ID(array[0] and array[3] or array[n]) is an integer check the *data* which is(array[1] and array[4] or array[n]) and if that data not contain more then one #, return false;
here is my sample code, but I'm only able to check the first and 2nd array,
if(preg_match('/^[1-7]{1,7}$/', current($arr))){
next($arr);
if(substr_count(next($arr),"#") <=1)
//false
else
echo "true";
}
help needed, thanks.

Answer 1

You can use a for loop, which allows you to control the start point, the condition when to stop and the step your using, so...
$arr = ["1234567", "7548#", "1254#abc#", "32514", "2548##", "3258#"];
for ( $i = 0; $i < count($arr); $i+=3) {
echo $arr[$i].PHP_EOL;
if ( preg_match('/^[1-7]{1,7}$/', $arr[$i]) ) {
if(substr_count($arr[$i+1],"#") > 1) { // Check if it's +1 or +2 here
echo "true".PHP_EOL;
}
else {
echo "false".PHP_EOL;
}
}
}
This loops from the start to the number of elements in your source, but just every 3rd item.
The rest uses similar code to what you've already got, but using the array elements relative to the loop counter ($arr[$i+1] for example). You will have to check if this is the right element you want to check as it may be $arr[$i+2], but the concept is the same.
This outputs..
1234567
false
32514
true
One thing I would recommend is to try and write if statements so that you always get something from it being 'true'. In your code you use <=1 and then there is nothing to do - if you change that round to >1, then it means you can get rid of the 'empty' statement.

Answer 2

you need to create a loop then you can write your rules for specific n.
$n = 3; //Your modulo
for($x = 0, $l = count($array); $x < $l; $x++ ) { //$array is your array
if($x % $n == 0) {
$result = preg_match('/^[1-7]{1,7}$/',$array[$x]);
} else if ($x % $n == 1) {
$result = substr_count($array[$x], '#') > 1;
} else {
$result = true; //no specific rule
}
if(!$result) { //if validation fails
echo "Validation failed";
break;
}
}