Usages of echo, print, print_r, var_dump(), printf()
Echo:
1) echo does not return a value.
2) This is faster than 'print' (*)
3) You can pass multiple expression
Print:
1) print return a value
2) This is slower than echo (*)
3) it takes single expression
The working example on different way to print the output on screen is given here.
* I tried to print 'Hello world' 10000 times using echo & print , So i found 20% time differences.
but let me clear one more thing that, with 1000 times of loop, both was taking same time.
Funny difference :
Its a human nature to be lazy, because of this reason most of php developer use echo rather than print.
echo is 4 character length and print is five. "T" is a extra finger point.
"; // Concatenation of two string slow down our process echo "Hello" , "
"; echo "aliencoders" , "
"; // Calling Echo multiple times still is also not good echo "Hello" , "aliencoders!" , "
"; // Best! In a large loop, this could save a couple of seconds. ?>
Conclusion : So what do we use? Echo of course!
print_r : syntax : mixed print_r(mixed $expression , bool $return);
prints human readable information about variable.
Generally use for printing array or object
printf() : Same as C programming – output a formatted string
var_dump() : void var_dump(mixed $expression,mixed $expression)
Gives deatails information about variable,array,object etc..
Next, we will discuss about syntax of : Conditional statement – if, else, nested if
Looping – for, while, do while & foreach
With Sample program
For more queries , post your comment here.
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