Potherca
9/19/2017 - 9:23 AM
Amount of code for the comparison of various styles of writing a `clamp` function in PHP Raw
Amount of code for the comparison of various styles of writing a clamp function in PHP Raw
<?php
$file = $argv[1];
$contents = file_get_contents($file);
$all_tokens = token_get_all($contents);
$tokens = array_filter($all_tokens, function ($token) {
return ! is_string($token) && (
$token[0] !== 382 // T_WHITESPACE
);
});
$name = basename($file);
$count_all = count($all_tokens);
$count = count($tokens);
echo <<<TXT
File : $name
Tokens All : $count_all
Tokens : $count
TXT;
📝 This text is part of the article Comparison of various styles of writing a clamp function in PHP
Summary
To measure the amount of code, different metrics can be used. For now I'll use the infamous lines of code (to represent how people see the code) and tokens (to represent how the PHP parser sees the code).
Line count
Lines of code can be easily counted using phploc(1).
| NCLOC(2) (100.00%) | LLOC(3) | Percentage | subject | description |
|---|---|---|---|---|
| 6 | 1 | 16.67% | 832B9C44 | return min max |
| 6 | 1 | 16.67% | 60AA891E | return/ternary/ternary |
| 14 | 3 | 21.43% | 7BC1F85B | if, if, return; |
| 14 | 3 | 21.43% | 83C742FF | if/return, if/return, return |
| 12 | 3 | 25.00% | 8389C469 | if, elseif, return |
| 12 | 3 | 25.00% | CAB599E9 | if/return, elseif/return, else/return |
| 8 | 3 | 37.50% | A13E087E | if/return, if/return, return (shorthand) |
Token count
Using the token_get_all function, it is possible to see how the PHP compiler sees the code.(4)
| tokens | non-whitespace tokens | subject | description |
|---|---|---|---|
| 36 | 12 | 832B9C44 | return min max |
| 52 | 14 | 60AA891E | return/ternary/ternary |
| 54 | 18 | A13E087E | if/return, if/return, return (shorthand) |
| 62 | 18 | 83C742FF | if/return, if/return, return |
| 66 | 18 | 7BC1F85B | if, if, return; |
| 66 | 18 | 8389C469 | if, elseif, return |
| 68 | 19 | CAB599E9 | if/return, elseif/return, else/return |
Footnotes
- Using the following command:
find . -name 'clamp.*.php' -exec sh -c 'phploc {} | grep "(LLOC)"' \; -print NCLOC= Non-Comment Lines of CodeLLOC= Logical Lines Of Codefind ../comparison-of-clamp-functions_55ca0e9377bbd49ee41241380e1fe3f9/ -type f -name '*.php' -not -path '*/vendor/*' -exec php ./count_tokens_in_file.php {} \;