Uendeshaji Ufupisho katika PHP

Wacha tupewe mfano wa msimbo ufuatao:

php<?php
  $num = 1;
  $num = $num + 2;
?>

Kama unavyoona, hapa badilisha inaandikwa thamani yake ya sasa pamoja na kitu kingine. Kwa shughuli kama hizi kuna kifupi maalum kiendeshaji +=, angalia mfano:

php<?php
  $num  = 1;
  $num += 3; // sawa na $num = $num + 3;
?>

Kuna viendeshaji sawa kwa shughuli zingine za hisabati:

php<?php
  $num  = 2;
  $num -= 3; // sawa na $num = $num - 3;
?>

php<?php
  $num  = 2;
  $num *= 3; // sawa na $num = $num * 3;
?>

php<?php
  $num  = 2;
  $num /= 3; // sawa na $num = $num / 3;
?>

php<?php
  $str  = 'a';
  $str .= 'b'; // sawa na $str = $str . 'b';
?>

php<?php
  $num = 47;
  $num = $num + 7;
  $num = $num - 18;
  $num = $num * 10;
  $num = $num / 15;
  echo $num;
?>

php<?php
  $str = 'a';
  $str = $str . 'b';
  $str = $str . 'c';
  
  echo $str;
?>