Php: how to compress multiple CSS and JS files-PHP source code

This article mainly introduces how to compress multiple CSS and JS files in php, and how to compress css files and js files by using two complete examples, for more information about how to compress multiple CSS and JS files in php, we use two complete examples to compress css files and js files, for more information, see

This example describes how php compresses multiple CSS and JS files. Share it with you for your reference. The specific implementation method is as follows:

1. compress css

The code is as follows:

Header ('content-type: text/css ');
Ob_start ("compress ");
Function compress ($ buffer ){
/* Remove comments */
$ Buffer = preg_replace ('! /\ * [^ *] * \ * + ([^/] [^ *] * \ * + )*/! ', '', $ Buffer );
/* Remove tabs, spaces, newlines, etc .*/
$ Buffer = str_replace (array ("\ r \ n", "\ r", "\ n", "\ t ",'','',''), '', $ buffer );
Return $ buffer;
}

/* Your css files */
Include('galleria.css ');
Include('articles.css ');

Ob_end_flush ();

The usage is as follows:

The code is as follows:

Test

2. compress js and use the jsmin class:

This instance originated from: https://www.php1.cn/

The code is as follows:

Header ('content-type: text/javascript ');
Require 'jsmin. php ';
Echo JSMin: minify (file_get_contents ('Common. js'). file_get_contents ('common2. js '));

The jsmin. php file is as follows:

The code is as follows:

  * @copyright 2002 Douglas Crockford 
 
   (jsmin.c) * @copyright 2008 Ryan Grove 
  
    (PHP port) * @copyright 2012 Adam Goforth  (Updates) * @license https://www.php1.cn/ MIT License * @version 1.1.2 (2012-05-01) * @link https://www.php1.cn/ */class JSMin {  const ORD_LF            = 10;  const ORD_SPACE         = 32;  const ACTION_KEEP_A     = 1;  const ACTION_DELETE_A   = 2;  const ACTION_DELETE_A_B = 3;  protected $a           = '';  protected $b           = '';  protected $input       = '';  protected $inputIndex  = 0;  protected $inputLength = 0;  protected $lookAhead   = null;  protected $output      = '';  // -- Public Static Methods --------------------------------------------------  /**   * Minify Javascript   *   * @uses __construct()   * @uses min()   * @param string $js Javascript to be minified   * @return string   */  public static function minify($js) {    $jsmin = new JSMin($js);    return $jsmin->min();  }  // -- Public Instance Methods ------------------------------------------------  /**   * Constructor   *   * @param string $input Javascript to be minified   */  public function __construct($input) {    $this->input       = str_replace("\r\n", "\n", $input);    $this->inputLength = strlen($this->input);  }  // -- Protected Instance Methods ---------------------------------------------  /**   * Action -- do something! What to do is determined by the $command argument.   *   * action treats a string as a single character. Wow!   * action recognizes a regular expression if it is preceded by ( or , or =.   *   * @uses next()   * @uses get()   * @throws JSMinException If parser errors are found:   *         - Unterminated string literal   *         - Unterminated regular expression set in regex literal   *         - Unterminated regular expression literal   * @param int $command One of class constants:   *      ACTION_KEEP_A      Output A. Copy B to A. Get the next B.   *      ACTION_DELETE_A    Copy B to A. Get the next B. (Delete A).   *      ACTION_DELETE_A_B  Get the next B. (Delete B).  */  protected function action($command) {    switch($command) {      case self::ACTION_KEEP_A:        $this->output .= $this->a;      case self::ACTION_DELETE_A:        $this->a = $this->b;        if ($this->a === "'" || $this->a === '"') {          for (;;) {            $this->output .= $this->a;            $this->a       = $this->get();            if ($this->a === $this->b) {              break;            }            if (ord($this->a) <= self::ORD_LF) {              throw new JSMinException('Unterminated string literal.');            }            if ($this->a === '\\') {              $this->output .= $this->a;              $this->a       = $this->get();            }          }        }      case self::ACTION_DELETE_A_B:        $this->b = $this->next();        if ($this->b === '/' && (            $this->a === '(' || $this->a === ',' || $this->a === '=' ||            $this->a === ':' || $this->a === '[' || $this->a === '!' ||            $this->a === '&' || $this->a === '|' || $this->a === '?' ||            $this->a === '{' || $this->a === '}' || $this->a === ';' ||            $this->a === "\n" )) {          $this->output .= $this->a . $this->b;          for (;;) {            $this->a = $this->get();            if ($this->a === '[') {              /*                inside a regex [...] set, which MAY contain a '/' itself. Example: mootools Form.Validator near line 460:                  return Form.Validator.getValidator('IsEmpty').test(element) || (/^(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]\.?){0,63}[a-z0-9!#$%&'*+/=?^_`{|}~-]@(?:(?:[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?\.)*[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\])$/i).test(element.get('value'));              */              for (;;) {                $this->output .= $this->a;                $this->a = $this->get();                if ($this->a === ']') {                    break;                } elseif ($this->a === '\\') {                  $this->output .= $this->a;                  $this->a       = $this->get();                } elseif (ord($this->a) <= self::ORD_LF) {                  throw new JSMinException('Unterminated regular expression set in regex literal.');                }              }            } elseif ($this->a === '/') {              break;            } elseif ($this->a === '\\') {              $this->output .= $this->a;              $this->a       = $this->get();            } elseif (ord($this->a) <= self::ORD_LF) {              throw new JSMinException('Unterminated regular expression literal.');            }            $this->output .= $this->a;          }          $this->b = $this->next();        }    }  }  /**   * Get next char. Convert ctrl char to space.   *   * @return string|null   */  protected function get() {    $c = $this->lookAhead;    $this->lookAhead = null;    if ($c === null) {      if ($this->inputIndex < $this->inputLength) {        $c = substr($this->input, $this->inputIndex, 1);        $this->inputIndex += 1;      } else {        $c = null;      }    }    if ($c === "\r") {      return "\n";    }    if ($c === null || $c === "\n" || ord($c) >= self::ORD_SPACE) {      return $c;    }    return ' ';  }  /**   * Is $c a letter, digit, underscore, dollar sign, or non-ASCII character.   *   * @return bool   */  protected function isAlphaNum($c) {    return ord($c) > 126 || $c === '\\' || preg_match('/^[\w\$]$/', $c) === 1;  }  /**   * Perform minification, return result   *   * @uses action()   * @uses isAlphaNum()   * @uses get()   * @uses peek()   * @return string   */  protected function min() {    if (0 == strncmp($this->peek(), "\xef", 1)) {        $this->get();        $this->get();        $this->get();    }     $this->a = "\n";    $this->action(self::ACTION_DELETE_A_B);    while ($this->a !== null) {      switch ($this->a) {        case ' ':          if ($this->isAlphaNum($this->b)) {            $this->action(self::ACTION_KEEP_A);          } else {            $this->action(self::ACTION_DELETE_A);          }          break;        case "\n":          switch ($this->b) {            case '{':            case '[':            case '(':            case '+':            case '-':            case '!':            case '~':              $this->action(self::ACTION_KEEP_A);              break;            case ' ':              $this->action(self::ACTION_DELETE_A_B);              break;            default:              if ($this->isAlphaNum($this->b)) {                $this->action(self::ACTION_KEEP_A);              }              else {                $this->action(self::ACTION_DELETE_A);              }          }          break;        default:          switch ($this->b) {            case ' ':              if ($this->isAlphaNum($this->a)) {                $this->action(self::ACTION_KEEP_A);                break;              }              $this->action(self::ACTION_DELETE_A_B);              break;            case "\n":              switch ($this->a) {                case '}':                case ']':                case ')':                case '+':                case '-':                case '"':                case "'":                  $this->action(self::ACTION_KEEP_A);                  break;                default:                  if ($this->isAlphaNum($this->a)) {                    $this->action(self::ACTION_KEEP_A);                  }                  else {                    $this->action(self::ACTION_DELETE_A_B);                  }              }              break;            default:              $this->action(self::ACTION_KEEP_A);              break;          }      }    }    return $this->output;  }  /**   * Get the next character, skipping over comments. peek() is used to see   *  if a '/' is followed by a '/' or '*'.   *   * @uses get()   * @uses peek()   * @throws JSMinException On unterminated comment.   * @return string   */  protected function next() {    $c = $this->get();    if ($c === '/') {      switch($this->peek()) {        case '/':          for (;;) {            $c = $this->get();            if (ord($c) <= self::ORD_LF) {              return $c;            }          }        case '*':          $this->get();          for (;;) {            switch($this->get()) {              case '*':                if ($this->peek() === '/') {                  $this->get();                  return ' ';                }                break;              case null:                throw new JSMinException('Unterminated comment.');            }          }        default:          return $c;      }    }    return $c;  }  /**   * Get next char. If is ctrl character, translate to a space or newline.   *   * @uses get()   * @return string|null   */  protected function peek() {    $this->lookAhead = $this->get();    return $this->lookAhead;  }}// -- Exceptions ---------------------------------------------------------------class JSMinException extends Exception {}?>