Php template engine

I don’t know how to write at all, usually only the code comes out, but I will try :)

I haven’t got used to the ability to use someone else’s ready-made solutions when developing websites and therefore I’m writing a lot myself, perhaps by analogy, but with full understanding and hope that in the future I can figure out this code. Somehow I got a question saying why are you writing your engine if you have a bunch of ready-made ones, take them and upgrade them for your purpose: connect the modules, tune and clog the database. As a matter of fact, I couldn’t answer, but I gave the idea - I like the code, and generally understand the new one.

Well, actually what I mean. In the next alteration of my engine I decided to write something like a template engine. There used to be an option, but not so convenient that you had to rule a lot, watch over many.



I read articles on this topic and somehow did not find anything new, except for one implementation.



The bottom line was that the template was a text file of the form

[*IF(blabla):*] present[*ELSE:*] [*ENDIF*]

.............



php, [* <? *] ?>

str_replace(array('[*','*]'), array('<?','?>'))

php .

ob_start();

error_reporting(E_ALL ^ E_NOTICE ^ E_WARNING);

include($templateCache);

error_reporting(E_ALL);

$text = ob_get_contents();

ob_end_clean();





,

ob_start();

error_reporting(E_ALL ^ E_NOTICE ^ E_WARNING);

eval('?>'.$codeFromTemplate.'<?');

error_reporting(E_ALL);

$text = ob_get_contents();

ob_end_clean();





- , , :) - , .

, "" , .

, .

, — .

foreach($templateVars as $k=>$v)

$$k = $v;





, Smarty . , , .

, demo, ...

[* *] . { }



{include 'last.tpl'}

{include ('last.tpl', ' ')}



, .

RegexBuddy( ) include



{\s*include\s*\({0,1}(\'{0,1}[$A-Za-z.0-9_\-]+\'{0,1})(?:(,{0,1}\s*\'{0,1}[$A-Za-z.0-9_\-]+\'{0,1})|\s*)\){0,1}\s*}



, :)

preg_replace

a , <?php w_include(${1}${2}); ?> .



w_include , .



, ( )

{if }{else} {/if}



{if }{/if}



, .



{if $a}

{if $b}

1

{/if}

2

{/if}



,

<? if($a){ ?>

{if $b}

1

<? } ?>

2

{/if}



, preg_replace . Smarty . .

,

<? if($a): ?>

...

<? endif; ?>





'/{\s*if\s*(.*?)\s*}/' => '<?php if(${1}): ?>'

'/{\s*else\s*}/' => '<?php else: ?>'

'/{\s*\/if\s*}/' => '<?php endif; ?>'



:)

, .



class t_wls_templater{

protected $dirTemplate = '';

protected $templateVars = array();

protected $templateFile, $templateCache;

// ---------------- preg

protected $wls_templater_preg = array(



// {include ('tpl', 'f')} {include 'tpl', 't'} { include 'tpl' } etc...

'/{\s*include\s*\({0,1}(\'{0,1}[$A-Za-z.0-9_\-]+\'{0,1})(?:(,{0,1}\s*\'{0,1}[$A-Za-z.0-9_\-]+\'{0,1})|\s*)\){0,1}\s*}/' => '<?php $this->w_include(${1}${2}); ?>',

// {if true } exit(); else {foo();} {/if}

'/{\s*if\s*(.*?)\s*}/' => '<?php if(${1}): ?>',

'/{\s*else\s*}/' => '<?php else: ?>',

// {for ($i=0;$i<$num;$i++)}echo $foo;{/endfor}

'/{\s*for\s*\((.*?);(.*?);(.*?)\)}/' => '<? for(${1}; ${2}; ${3}): ?>',

'/{\s*\/(for|if)\s*}/' => '<?php end${1}; ?>',

// { all text }

'/{(.*?)}/' => '<?${1}?>'

);

// ---------------- end preg

public function __construct($dir=''){

$this->dirTemplate = empty($dir)?.'./templates/':$dir;

}



public function assign($name,$value){

$this->templateVars[$name] = $value;

}



public function parse($filename,$innerTemplateName=''){

// create vars what's used in templates

$THIS_TEMPLATE_NAME = $innerTemplateName;

$THIS_TEMPLATE_FILE = $filename;

$THIS_TEMPLATE_DIR = $this->dirTemplate;

foreach($this->templateVars as $k=>$v){

$$k = $v;

}

// end create

if(!is_file($this->dirTemplate.$filename)){

return false;

}

$this->templateFile = $this->dirTemplate.$filename;

$this->templateCache = './templates_cache/_'.$_tmp['name'].'_'.$filename.'.php';



$orig_time = filemtime($this->templateFile);



if(is_file($this->templateCache)){

$cash_time = filemtime($this->templateCache);

if($cash_time>$orig_time){

$this->_deb->addEvent('info', 'Use cache for template '.$filename.' ');

ob_start();

error_reporting(E_ALL ^ E_NOTICE ^ E_WARNING);

include($this->templateCache);

error_reporting(E_ALL);

$text = ob_get_contents();

ob_end_clean();

return $text;

}

}



$text = file_get_contents($this->templateFile);

foreach($this->wls_templater_preg as $preg=>$replace){

$text = preg_replace($preg, $replace, $text);

}

$f = fopen($this->templateCache,'w');

fwrite($f,$text);

fclose($f);

ob_start();

error_reporting(E_ALL ^ E_NOTICE ^ E_WARNING);

eval('?>'.$text.'<?');

error_reporting(E_ALL);

$text = ob_get_contents();

ob_end_clean();

return $text;

}

protected function w_include($fname, $innerTemplateName = ''){

$_tmp = $this->parse($fname, $innerTemplateName);

echo $_tmp;

}

}