Remove blank and comments from PHP code

PHP has a built-in php_strip_whitespace Method for reading PHP files and removing spaces and comments in the Code. However, PHP does not support direct reading of blank and comments. The following method supports reading string content, the ThinkPHP framework also has the built-in method.

/**

* Remove blank and comments from the code

* @ Param string $ content Code content

* @ Return string

*/

Function strip_whitespace ($ content ){

$ StripStr = '';

// Analyze the 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 comments

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;

}