echo and print

[vg55]

I am quite new to php. I do not understand the following behaviour.

The outputs are given in comment.

 

echo '1';          // 1

echo "<br/>"; 

print(2);          // 2

echo "<br/>";

print(2) + 3;    //  5

echo "<br/>";

echo ''.print(2) + 3;  // 51

echo "<br/>";

echo '1'.print(2) + 3; // 511

 

Could you please explain it. I could not understand the output in colored lines.

Thanks.

 

[Jibberish]

Its because print is a language construct and not a function. and the parenthesis arround it arn't required.

 

So its actually reading in the 2 + 3 which is 5. print also always returns 1

 

so for the 51 it first prints out 2+3 which is 5, it then echos out what print returned which is 1. so the final output is 51

 

For the 511, it first prints out the 5, then echos the 1 in the ' marks, it then echos the return of the print, which again is 1. and you have 511

[haku]

print also always returns 1

 

Learn something new on this site all the time. Good little nugget of info there - I don't know how I would ever use it, but I may someday.

[vg55]

Thanks Jibberish .

[cs.punk]

Yeah me learned that too right now :-?