How to convert a string of numbers into an array? - php

Question

I have a string e.g. 1398723242. I am trying to check this string and get the odd numbers out which in this case is 13973.
I am facing problem on how to put this string into an array. After putting the string into an array I know that I have to loop through the array, something like this:
foreach($array as $value){
if($value % 2 !== 0){
echo $value;
}
}
So can any body please help on the first part on "How to put the above string into an array so I can evaluate each digit in the above loop?"

Answer 1

This should work for you:
Just use str_split() to split your string into an array. Then you can use array_filter() to filter the even numbers out. e.g.
<?php
$str = "1398723242";
$filtered = array_filter(str_split($str), function($v){
return $v & 1;
});
echo implode("", $filtered);
?>
output:
13973

Answer 2

Array map is your function (mixed with split)
$array = array_map('intval', str_split($number));
foreach($array as $value){
if($value % 2 !== 0){
echo $value;
}
}

Answer 3

Use str_split() http://www.php.net/manual/en/function.str-split.php
$string = "1398723242";
$array = str_split($string);
foreach($array as $value){
if($value % 2 !== 0){
echo $value;
}
}

Answer 4

if you want string as result, don't convert to array
$str = "1398723242";
echo preg_replace('/0|2|4|6|8/','', $str); //13973
Or, more faster
echo str_replace(array(0,2,4,6,8),'', $str); //13973

Answer 5

You have to know if the string is an array of chars. so you can just iterate it :
<?php
$string = "1398723242";
for($i=0; $i < strlen($string); ++$i){
if($string[$i]=='....'){
$string[$i] = ''; // Just replace the index like this
}
}
?>

Answer 6

$str = '1398723242';
$strlen = strlen($str);// Get length of thr string
$newstr;
for($i=0;$i<$strlen;$i++){ // apply loop to get individual character
if($str[$i]%2==1){ // check for odd numbers and get into a string
$newstr .= $str[$i];
}
}
echo $newstr;