Echo ‘N’ Number Of Words

Description: To get the first 250 words offset you can use in a loop like this.

$the_string = "a very long string of words";
$space_offset = 0;
$space_num = 0;
WHILE($space_num <= 250){
$space_offset  = stripos($the_string, ' ',$space_offset + 1);
// after the loop completes, $space_offset will have the offset
// of the space just before the 250th word.

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