PHP split string to next period (.) - php

Question

My aim is to split string after every 7 words. If the 7th word has a comma (,), move to the next word with period (.) or exclamation (!)
So far, I've been able to split string by 7 words, but cannot check if it contains commas (,) or move to the next word with . or !
$string = "I have a feeling about the rain, let us ride. He figured I was only joking.";
$explode = explode(" ", $string);
$chunk_str = array_chunk($explode, 7);
for ($x=0; $x<count($chunk_str); $x++)
{
$strip = implode(" ",$chunk_str[$x]);
echo $strip.'<br><br>';
}
I expect
I have a feeling about the rain, let us ride.
He figured I was only joking.
But the actual output is
I have a feeling about the rain,
let us ride. He figured I was
only joking.

Answer 1

Here's one way to do what you want. Iterate through the list of words, 7 at a time. If the 7th word ends with a comma, increase the list pointer until you reach a word ending with a period or exclamation mark (or the end of the string). Output the current chunk. When you reach the end of the string, output any remaining words.
$string = "I have a feeling about the rain, let us ride. He figured I was only joking.";
$explode = explode(' ', $string);
$num_words = count($explode);
if ($num_words < 7) {
echo $string;
}
else {
$k = 0;
for ($i = 6; $i < count($explode); $i += 7) {
if (substr($explode[$i], -1) == ',') {
while ($i < $num_words && substr($explode[$i], -1) != '.' && substr($explode[$i], -1) != '!') $i++;
}
echo implode(' ', array_slice($explode, $k, $i - $k + 1)) . PHP_EOL;
$k = $i + 1;
}
}
echo implode(' ', array_slice($explode, $k)) . PHP_EOL;
Output:
I have a feeling about the rain, let us ride.
He figured I was only joking.
Demo on 3v4l.org