Question

i have also got a similar question. I have an array where i need to extract parts from the keys of array and combine them. can you please suggest the best way for it.

$myarray=Array(
[0]=>'unwanted text'

[1]=>'unwanted+needed part1'

[2]=>'needed part2'

[3]=>'needed part3'

[4]=>'unwanted text'

)

how can i extract only the needed parts and combine them. Thanks a lot ahead.

Answer 1

Not exactly sure if this does what you want, but looping and copying to a new array should basically achieve your result (once you clarify how you decide which part of the strings are needed or unwanted)

$myarray = array(…);
$new_array = array();
$unwanted = 'some_string';
foreach($myarray as $k => $v) {
  $new_value = preg_replace("/^$unwanted/", '', $v); # replace unwanted parts with empty string (removes them);
  if(!empty($new_value)) { # did we just remove the entry completely? if so, don't append it to the new array
    $new_array[] = $v; # or $new_array[$k] if you want to keep indices.
  }
}

Assuming you want to join array entries and have a string as result, use the implode function of PHP: $string = implode(' ', $new_array);