Save values of protein sequence in Array

[isofteck]

I have a sequence of Protein.
I have pasted it in html Text Area
Now, I want to save the values of Alphabets
in Array.
for example
sequence is
bcadefg-aopqsozv-dop
now I want to save it in array from text area
what should be php code

[NogDog]

Without knowing how you want the resulting array to be structured, it will be difficult to answer. Maybe use explode() on the "-" character? Maybe use str_split() to make an array where each element is one character? Maybe a combination of both? Maybe something totally different?

For that matter, a string can be used as an array of characters:

$protein = "bcadefg-aopqsozv-dop";
echo "The 5th character is: " . $protein[4];

[isofteck]

sir, Actually. I have 2 sequences.
One is Reference Sequence and 2nd is comparable Sequence.
In One HTML Text Area, we paste Reference Sequence and then click to add it into Array A
and in Second text area, we paste comparable sequence then Click it to add into Array B.
After it, we compare these 2 arrays.
Array A aaaxzwer-eh

Array B aaaszwde-di

Resultant Array 11101100100
where alphabits are same value is 1
where alphabits are different value is 0
then we add all numbers result is 6 and save it in database

[bradgrafelman]

Sounds like you just need to use a [man]for/man loop to access each character of the two strings, compare those characters, and append either a "1" or a "0" to a new resultant string. (Note that this is all dealing with strings... your use of the word "array" is a bit misleading here since it doesn't sound like you're dealing with an [man]array[/man] data structure in any way.)

[NogDog]

Because I didn't feel like working on what I should be working on....

<?php

function compareProteinStrings($str1, $str2)
{
	if(strlen($str1) != strlen($str2)) {
		throw new Exception("Strings are not the same length");
	}
	$result = '';
	for($i=0; $i < strlen($str1); $i++) {
		$result .= (int) ($str1[$i] === $str2[$i]);
	}
	return $result;
}

$test1 = 'abcd-efgh';
$test2 = 'abcb-efeh';
echo compareProteinStrings($test1, $test2);

Output:

111011101

[Weedpacket]

I'm the same way as NogDog right now...

function compareProteinStrings($str1, $str2)
{
	static $mapping = null;
	if(!isset($mapping))
	{
		$mapping = array_fill_keys(array_map('chr', range(1,255)), '0');
		$mapping[chr(0)] = '1';
	}
	if(strlen($str1) != strlen($str2))
	{
		throw new Exception("Strings are not the same length");
	}
	return strtr($str1 ^ $str2, $mapping);
}

In passing, the [man]levenshtein[/man] function can be used to measure the edit distance between two strings.