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PHP

Echo & String Concatenation

echo can print several things separated by commas, or you can join (concatenate) strings into one using the . operator.

Example: building a full name

<?php
  $first = "Chi";
  $last = "nedu";
  echo $first . $last;
?>
Chinedu

PHP uses . for string concatenation — worth noting explicitly, since many other languages (JavaScript, Python) reuse + for the same job, and reaching for + out of habit in PHP does something entirely different (numeric addition, which usually produces an unexpected result or a warning when applied to text).

Example
<?php
  $first = "Chi";
  $last = "nedu";
  echo $first . $last;
?>
Output
Chinedu