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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
<?php
$text = 'WhichN.B.C.';
$text = preg_replace_callback('/(\d+\.\d+|\b[A-Z](?:\.[A-Z])*\b\.?)|([.,;:!?)])\s*/', function ($matches) {
return $matches[1] ? $matches[1] : $matches[2] . ' ';
}, $text);
echo $text;