Remove whitespace and annotations from PHP code

PHP has a built-in Php_strip_whitespace method for reading php files and removing whitespace and comments in the code, but does not support direct read content to remove whitespace and annotations, the following method can support reading string content, and the thinkphp framework built-in the method.

/**

* Remove whitespace and annotations from the code

* @param string $content code content

* @return String

*/

function Strip_whitespace ($content) {

$stripStr = ';

Analyze PHP Source code

$tokens = Token_get_all ($content);

$last _space = false;

for ($i = 0, $j = count ($tokens); $i < $j; $i + +) {

if (is_string ($tokens [$i])) {

$last _space = false;

$stripStr. = $tokens [$i];

} else {

Switch ($tokens [$i][0]) {

Filter various PHP annotations

Case T_comment:

Case T_doc_comment:

Break

Filter spaces

Case T_whitespace:

if (! $last _space) {

$stripStr. = ';

$last _space = true;

}

Break

Case T_start_heredoc:

$stripStr. = "<<

Break

Case T_end_heredoc:

$stripStr. = "Think;n";

for ($k = $i +1; $k < $j; $k + +) {

if (is_string ($tokens [$k]) && $tokens [$k] = = '; ') {

$i = $k;

Break

else if ($tokens [$k][0] = = T_close_tag) {

Break

}

}

Break

Default

$last _space = false;

$stripStr. = $tokens [$i][1];

}

}

}

return $stripStr;

}