How to compare file data array() with normal array

[Aditya sant]

Am spliting file string into array by using fgets(),and explode()
On other hand am taking string from user,and again spliting it into array
now I have 2 array
when I compare 2 arrays by using array_intersect()(even by using 2 foreach(as a last try))...it is returning null array(Array()) even if they have common elements
WHY?
is any special settings/parameter/syntax require to compare file data with normal array?

[code green]

Let us see a portion of both arrays

[Shenno]

do u need to find common elements in 2 arrays ?

u can loop through the bigger one.. "use count() to find which one is bigger"

then use in_array() function and if condition inside the loop to find if each element in big array is already exist in other array..

inside if cindition u can add this common elements in third array if u want like this

 
if(in_array($big_array[$i] , $small_array))
{
$common_array[] = $big_array[$i];
}
 
 

hope this helps.

[kovik]

@Shenno: ... You just rebuilt array_intersect().

[Shenno]

he says array_intersect give 'em null array.

this may let him analyse why he get null array easly..

[kovik]

Outputting the arrays to ensure that there actually ARE matching elements will help him analyze why he is getting an empty array, not running the same code in a different format.

[Shenno]

FOR ME, my method makes me feel comfortable while seeing every thing is running step by step.

[kovik]

Which would make sense if your code showed the user everything, step by step.

foreach ($array1 as $array1_data) {
  echo "Array 1 data, '$array1_data', "
    . (in_array($array1_data, $array2) ? 'is' : '<b>is not</b>')
    . " in Array 2.<br />\n";
}

[Shenno]

xD

u have wrote a code specialized in showing which elements in common, outputing on screen.

main goal is common element array.

[kovik]

Right, which is the exact goal of array_intersect(). If the OP is not getting the correct results from array_intersect(), then they won't get the correct results from your remake, either.

[Shenno]

u know break points ?

mine makes me able to make something like that in my mind, which is not provided in array_intersect().

[kovik]

I don't even use breakpoints while programming or debugging. I doubt the OP does.

[Shenno]

and does too for question poster.