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<?php $number = '+421917982116'; $haveNumberPlus = strpos($number, '+'); if ($haveNumberPlus === false) { echo number_format((int)$number, 0, ' ', ' '); } echo '+' . number_format((int)$number, 0, ' ', ' ');
Output for 7.1.4, 7.3.24 - 7.3.33, 7.4.12 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
+421 917 982 116

preferences:
122.16 ms | 402 KiB | 115 Q