<?php define("KEY_NOT_EXISTS", '^R_key_not_Exists^'); class Template { var $r; var $search; var $replace; var $stack = array(); var $nodes = array(); var $done = false; var $d = false; var $lang = null; var $debug = false; private function _preg_error() { switch (preg_last_error()) { case PREG_INTERNAL_ERROR: echo('PREG_INTERNAL_ERROR'); break; case PREG_BACKTRACK_LIMIT_ERROR: echo('PREG_BACKTRACK_LIMIT_ERROR'); break; case PREG_RECURSION_LIMIT_ERROR: echo('PREG_RECURSION_LIMIT_ERROR'); break; case PREG_BAD_UTF8_ERROR: echo('PREG_BAD_UTF8_ERROR'); break; // This is only valid for php > 5.3, not certain how to code around it for unit tests // case PREG_BAD_UTF8_OFFSET_ERROR: echo('PREG_BAD_UTF8_OFFSET_ERROR'); break; default: //die("Unknown preg error."); return; } echo "<hr><pre>"; debug_print_backtrace(); die(); } private function _push_stack() { $this->stack[] = array($this->r, $this->nodes); } private function _pop_stack() { list($this->r, $this->nodes) = array_pop($this->stack); } private function _get_var($name, $retNoKey = false) { $keys = array_map('trim', explode(".", $name)); if ($retNoKey && !array_key_exists($keys[0], $this->r)) return KEY_NOT_EXISTS; $val = $this->r; foreach ($keys as $k) { $val = (isset($val[$k]) ? $val[$k] : null); } return $val; } /** * IF node * * {{ if <$var> }}...[{{ else }} ...] {{ endif }} * {{ if <$var>==<val|$var> }}...[{{ else }} ...]{{ endif }} * {{ if <$var>!=<val|$var> }}...[{{ else }} ...]{{ endif }} */ private function _replcb_if($args) { if (strpos($args[2], "==") > 0) { list($a, $b) = array_map("trim", explode("==", $args[2])); $a = $this->_get_var($a); if ($b[0] == "$") $b = $this->_get_var($b); $val = ($a == $b); } else if (strpos($args[2], "!=") > 0) { list($a, $b) = array_map("trim", explode("!=", $args[2])); $a = $this->_get_var($a); if ($b[0] == "$") $b = $this->_get_var($b); $val = ($a != $b); } else { $val = $this->_get_var($args[2]); } $x = preg_split("|{{ *else *}}|", $args[3]); return ( $val ? $x[0] : (isset($x[1]) ? $x[1] : "")); } /** * FOR node * * {{ for <$var> as $name }}...{{ endfor }} * {{ for <$var> as $key=>$name }}...{{ endfor }} */ private function _replcb_for($args) { $m = array_map('trim', explode(" as ", $args[2])); $x = explode("=>", $m[1]); if (count($x) == 1) { $varname = $x[0]; $keyname = ""; } else { list($keyname, $varname) = $x; } if ($m[0] == "" || $varname == "" || is_null($varname)) die("template error: 'for " . $m[0] . " as " . $varname . "'"); //$vals = $this->r[$m[0]]; $vals = $this->_get_var($m[0]); $ret = ""; if (!is_array($vals)) return $ret; foreach ($vals as $k => $v) { $this->_push_stack(); $r = $this->r; $r[$varname] = $v; if ($keyname != '') $r[$keyname] = (($k === 0) ? '0' : $k); $ret .= $this->replace($args[3], $r); $this->_pop_stack(); } return $ret; } /** * INC node * * {{ inc <templatefile> [with $var1=$var2] }}{{ endinc }} */ private function _replcb_inc($args) { if (strpos($args[2], "with")) { list($tplfile, $newctx) = array_map('trim', explode("with", $args[2])); } else { $tplfile = trim($args[2]); $newctx = null; } if ($tplfile[0] == "$") $tplfile = $this->_get_var($tplfile); $this->_push_stack(); $r = $this->r; if (!is_null($newctx)) { list($a, $b) = array_map('trim', explode("=", $newctx)); $r[$a] = $this->_get_var($b); } $this->nodes = Array(); $tpl = get_markup_template($tplfile); $ret = $this->replace($tpl, $r); $this->_pop_stack(); return $ret; } /** * DEBUG node * * {{ debug $var [$var [$var [...]]] }}{{ enddebug }} * * replace node with <pre>var_dump($var, $var, ...);</pre> */ private function _replcb_debug($args) { $vars = array_map('trim', explode(" ", $args[2])); $vars[] = $args[1]; $ret = "<pre>"; foreach ($vars as $var) { $ret .= htmlspecialchars(var_export($this->_get_var($var), true)); $ret .= "\n"; } $ret .= "</pre>"; return $ret; } private function _replcb_node($m) { $node = $this->nodes[$m[1]]; if (method_exists($this, "_replcb_" . $node[1])) { $s = call_user_func(array($this, "_replcb_" . $node[1]), $node); } else { $s = ""; } $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s); return $s; } private function _replcb($m) { //var_dump(array_map('htmlspecialchars', $m)); $this->done = false; $this->nodes[] = (array) $m; return "||" . (count($this->nodes) - 1) . "||"; } private function _build_nodes($s) { $this->done = false; while (!$this->done) { $this->done = true; $s = preg_replace_callback('|{{ *([a-z]*) *([^}]*)}}([^{]*({{ *else *}}[^{]*)?){{ *end\1 *}}|', array($this, "_replcb"), $s); if ($s == Null) $this->_preg_error(); } //({{ *else *}}[^{]*)? krsort($this->nodes); return $s; } private function var_replace($s) { $m = array(); /** regexp: * \$ literal $ * (\[)? optional open square bracket * ([a-zA-Z0-9-_]+\.?)+ var name, followed by optional * dot, repeated at least 1 time * (|[a-zA-Z0-9-_:]+)* pipe followed by filter name and args, zero or many * (?(1)\]) if there was opened square bracket * (subgrup 1), match close bracket */ if (preg_match_all('/\$(\[)?([a-zA-Z0-9-_]+\.?)+(\|[a-zA-Z0-9-_:]+)*(?(1)\])/', $s, $m)) { foreach ($m[0] as $var) { $exp = str_replace(array("[", "]"), array("", ""), $var); $exptks = explode("|", $exp); $varn = $exptks[0]; unset($exptks[0]); $val = $this->_get_var($varn, true); if ($val != KEY_NOT_EXISTS) { /* run filters */ /* * Filter are in form of: * filtername:arg:arg:arg * * "filtername" is function name * "arg"s are optional, var value is appended to the end * if one "arg"==='x' , is replaced with var value * * examples: * $item.body|htmlspecialchars // escape html chars * $item.body|htmlspecialchars|strtoupper // escape html and uppercase result * $item.created|date:%Y %M %j // format date (created is a timestamp) * $item.body|str_replace:cat:dog // replace all "cat" with "dog" * $item.body|str_replace:cat:dog:x:1 // replace one "cat" with "dog" */ foreach ($exptks as $filterstr) { $filter = explode(":", $filterstr); $filtername = $filter[0]; unset($filter[0]); $valkey = array_search("x", $filter); if ($valkey === false) { $filter[] = $val; } else { $filter[$valkey] = $val; } if (function_exists($filtername)) { $val = call_user_func_array($filtername, $filter); } } $s = str_replace($var, $val, $s); } } } return $s; } public function replace($s, $r) { $this->r = $r; // remove comments block $s = preg_replace('/{#(.*?\s*?)*?#}/', "", $s); $s = $this->_build_nodes($s); $s = preg_replace_callback('/\|\|([0-9]+)\|\|/', array($this, "_replcb_node"), $s); if ($s == Null) $this->_preg_error(); // replace strings recursively (limit to 10 loops) $os = ""; $count = 0; while ($os != $s && $count < 10) { $os = $s; $count++; $s = $this->var_replace($s); } return $s; } } $t = new Template; function template_escape($s) { return str_replace(array('$', '{{'), array('!_Doll^Ars1Az_!', '!_DoubLe^BraceS4Rw_!'), $s); } function template_unescape($s) { return str_replace(array('!_Doll^Ars1Az_!', '!_DoubLe^BraceS4Rw_!'), array('$', '{{'), $s); }