By example:
FirstString='apple,gold,nature,grass,class'
SecondString='gold,class'
the Result must be :
ResultString='apple,nature,grass'
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3 Answers
$first = explode(',',$firstString);
$second = explode(',',$secondString);
Now you have arrays and you can do whatever you want with them.
$result = array_diff($first, $second);
Comments
this is the easy way (for sure there must be more efficient ones):
First of all, you may want to separate those coma-separated strings and put them into an array (using the explode function):
$array1 = explode(',' $firstString);
$array2 = explode(',' $secondString);
Then, you can loop the first array and check whether it contents words of the second one using the in_array function (if so, delete it using the unset function):
// loop
foreach( $arra1 as $index => $value){
if( in_array ( $value , $array2 ) )
unset($array1[$index]); // delete that word from the array
}
Finally, you can create a new string with the result using the implode function:
$result = implode(',' , $array1);
That's it :D
1 Comment
Fletcher Moore
You've got explode and implode backwards.
I'm sure there is a function that can do it but you could always break up the strings and do a foreach on each one and do some string compares and build a new string. You could also break apart the second string and create a regular expression and do a preg_replace to replace the values in the string.
