3v4l.org

run code in 300+ PHP versions simultaneously
<?php function first_letter($str) { $arr2 = array_filter(array_map('trim',explode(' ', $str))); $result=''; foreach($arr2 as $v) { $result.=$v[0]; } return $result; } $str=" Let's try with more spaces for fun . "; echo first_letter($str); ?>
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Ltwmsff.
preferences:
117.19 ms | 410 KiB | 5 Q