How are echo and print different in PHP? [duplicate]

by

From:
http://web.archive.org/web/20090221144611/http://faqts.com/knowledge_base/view.phtml/aid/1/fid/40

  1. Speed. There is a difference between the two, but speed-wise it
    should be irrelevant which one you use. echo is marginally faster
    since it doesn’t set a return value if you really want to get down to the
    nitty gritty.

  2. Expression. print() behaves like a function in that you can do:
    $ret = print "Hello World"; And $ret will be 1. That means that print
    can be used as part of a more complex expression where echo cannot. An
    example from the PHP Manual:

$b ? print "true" : print "false";

print is also part of the precedence table which it needs to be if it
is to be used within a complex expression. It is just about at the bottom
of the precedence list though. Only , AND OR XOR are lower.

  1. Parameter(s). The grammar is: echo expression [, expression[,
    expression] ... ]     But echo ( expression, expression ) is not valid.
    This would be valid: echo ("howdy"),("partner"); the same as: echo
    "howdy","partner"    ; (Putting the brackets in that simple example
    serves
    no purpose since there is no operator precedence issue with a single
    term like that.)

So, echo without parentheses can take multiple parameters, which get
concatenated:

   echo  "and a ", 1, 2, 3;   // comma-separated without parentheses
   echo ("and a 123");        // just one parameter with parentheses

print() can only take one parameter:

   print ("and a 123");
   print  "and a 123";

More Related Contents:

  1. Browser detection in PHP causes white screen [closed]
  2. Echo in an image
  3. How can I echo HTML in PHP?
  4. How to flush output after each `echo` call?
  5. PHP echo vs PHP short echo tags
  6. php – insert a variable in an echo string
  7. Reference: Comparing PHP’s print and echo
  8. What is the difference between PHP echo and PHP return in plain English?
  9. Can I echo a variable with single quotes?
  10. PHP to search within txt file and echo the whole line
  11. PHP POST not working
  12. How to use single quote inside an echo which is using single quote
  13. PHP printed boolean value is empty, why?
  14. Difference between php echo and return in terms of a jQuery ajax call [closed]
  15. How to echo in PHP, HTML tags
  16. Add PHP variable inside echo statement as href link address?
  17. How can I echo the whole content of a .html file in PHP?
  18. How to clear previously echoed items in PHP
  19. How to use css style in php
  20. php echo vs open&close tag
  21. PHP file_get_contents does not work on localhost
  22. What is the ASP.Net equivalent to PHP’s Echo?
  23. PHP Echo text Color
  24. PHP – SSL certificate error: unable to get local issuer certificate
  25. How to use php serialize() and unserialize()
  26. Laravel – Model Class not found
  27. PHP – Find parent key of array
  28. Back button re-submit form data ($_POST)
  29. PHP exec $PATH variable missing elements
  30. How to get last insert id in Eloquent ORM laravel

Leave a Comment