[SOLVED] .= ?? what is it exacly?

[Foser]

In some functions like mail there is a repeated variable. and most of them have .= like

 

$var1 .= "text";

 

what does the .= mean?

[redarrow]

caternation

 

 

addingone.toanother

 

<?PHP

 

$a.="HELLO ";

 

$a.=" THERE I AM";

 

 

$a.=" REDARROW";

 

echo $a;

?>

[Foser]

so its like one big variable.

[redarrow]

there you go nearly right.

 

http://karma.nucleuscms.org/item/27/catid/6

[redarrow]

As we have already seen in the Echo Lesson, the period "." is used to add two strings together, or more technically, the period is the concatenation operator for strings.

 

PHP Code:

$a_string = "Hello";

$another_string = " Billy";

$new_string = $a_string . $another_string;

echo $new_string . "!";

 

Display:

Hello Billy!

 

link

http://www.tizag.com/phpT/operators.php

[Yesideez]

The .= operator is handy if you have a loop running and want to repeatedly add something onto the end of a string.

 

<?php
  $txt='';
  for ($i=0;$i<5;$i++) {
    $txt.='*';
  }
  echo $txt;
?>

 

The above is exactly the same as this:

 

<?php
  $txt='';
  for ($i=0;$i<5;$i++) {
    $txt=$txt.'*';
  }
  echo $txt;
?>

 

All the above does is make a string containing "*****" (five stars)