What is the Diff. Between echo() and Print() in PHP?
Answer Posted / rajesh kumar vishwakarma
echo() is not actually a function (it is a language
construct) so you are not required to use parentheses with
it. In fact, if you want to pass more than one parameter to
echo, you must not enclose the parameters within parentheses.
print() is not actually a real function (it is a language
construct) so you are not required to use parentheses with
its argument list.
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 and XOR are
lower.
3. 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";
Is This Answer Correct ? | 9 Yes | 0 No |
Post New Answer View All Answers
How to get the ip address of the client?
How many escape sequences are recognized in double-quoted strings in php?
Explain what does the unset() function means?
What is oops php?
Is age a variable in research?
What is env in laravel?
What is difference between required and require_once in php?
Explain what are psrs? Choose 1 and briefly describe it?
How to retrieve values out of an array?
How to block direct directory access in PHP?
How do I check if a given variable is empty?
What are Routines?
Tell me how can we define a variable accessible in functions of a php script?
Tell me what is the meaning of a final class and a final method?
What is a php session?