eval - How to create own php templating system? -

i have 2 files name test.txt contains template code.i need evalute template evaluated php. eval() function giving errors on ifelse , other similar conditions.

test.txt

@$firmware_path=true; @$dialplan=1312321; @$max_lines=3; @$data=array(); @$operator_ip=''; @$enabled=true; @ if ($firmware_path)  @{     firmware server: http://{$operator_ip}{$firmware_path} @ }    @ ($i = 1; $i <= $max_lines; $i++) @ {     @ $enabled = isset($lines[$i - 1]);     @ if ($enabled)      @{         @ $data = $lines[$i -1];          @ if ($data['user_fullname'])          @{             @ if ($phone_label)              @{                 @ $screenname = $data['user_fullname'] . ' ' . $data['telnum'];                 @ $screenname2 = $phone_label;             @ }              @else              @{                 @ $screenname = $data['user_fullname'];                 @ $screenname2 = $data['telnum'];             @ }         @ }          @else          @{             @ $screenname = $data['telnum'];             @ $screenname2 = $phone_label;         @ }      @ } @ } 

index.php

<?php  $file = fopen("test.txt","r"); $arr=array(); while(! feof($file)) {   $arr[]=fgets($file); }   $format=''; foreach($arr $key=>$value) {   if(substr(ltrim($value), 0, 1) === '@')   {     $result=str_replace('@','',$value);      $format.=$result.php_eol;    }   else   {      $format.='$final="'.$value.'";';   }  }    $format.=' return $final;'; echo eval($format);   ?> 

the result should generated according php

i solved problem . php templating , in try use custom changeable code executed in scenarios.

here algorithm used :

note put template code in $arr

$arr=str_replace('transliterate','urldecode',$arr);  $format='$final="";'; foreach($arr $key=>$value) { if(substr(ltrim($value), 0, 1) === '@') { //run php line through eval $result=str_replace('@','',$value);  $format.=$result.php_eol;  } else {  // echo normal php echo line  $value=str_replace('"','\"',$value);   $value=str_replace('{','".(',$value);  $value=str_replace('}',')."',$value);   $format.='$final.="'.$value.'";'.php_eol; }  }   $format.=' return $final;';  $evaled_result= eval($format);