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一个易用的模板类

作者:佚名    文章来源:网络转载    更新时间:2007-11-26 23:59:47
PHP代码:--------------------------------------------------------------------------------

<?php
if(!defined("__TEMPLATE_H_PHP__")){
define("__TEMPLATE_H_PHP__","template.h.php");
/******************** CODE START ********************/

//PHP类库:template.h.php
//运行环境:PHP4.0
//修改时间:2002-08-01
//最后修改:stangly.wrong
//类库简介:模板的提取显示的类
/////////////////////////////////////////////////////////////

//类名:模板基类 Template_base
//功能:模板具体操作类。
class Template_base {
var $classname = "Template_base";

/* if set, echo assignments */
var $debug = false;

/* $file[handle] = "filename"; */
var $file = array();

/* relative filenames are relative to this pathname */
var $root = "";

/* $varkeys[key] = "key"; $varvals[key] = "value"; */
var $varkeys = array();
var $varvals = array();

/* "remove" => remove undefined variables
* "comment" => replace undefined variables with comments
* "keep" => keep undefined variables
*/
var $unknowns = "remove";

/* "yes" => halt, "report" => report error, continue, "no" => ignore error quietly */
var $halt_on_error = "yes";

/* last error message is retained here */
var $last_error = "";


/***************************************************************************/
/* public: Constructor.
* root: template directory.
* unknowns: how to handle unknown variables.
*/
function Template_base($root = ".", $unknowns = "remove") {
$this->set_root($root);
$this->set_unknowns($unknowns);
}

/* public: setroot(pathname $root)
* root: new template directory.
*/
function set_root($root) {
if (!is_dir($root)) {
$this->halt("set_root: $root is not a directory.");
return false;
}

$this->root = $root;
return true;
}

/* public: set_unknowns(enum $unknowns)
* unknowns: "remove", "comment", "keep"
*
*/
function set_unknowns($unknowns = "keep") {
$this->unknowns = $unknowns;
}

/* public: set_file(array $filelist)
* filelist: array of handle, filename pairs.
*
* public: set_file(string $handle, string $filename)
* handle: handle for a filename,
* filename: name of template file
*/
function set_file($handle, $filename = "") {
if (!is_array($handle)) {
if ($filename == "") {
$this->halt("set_file: For handle $handle filename is empty.");
return false;
}
$this->file[$handle] = $this->filename($filename);
} else {
reset($handle);
while(list($h, $f) = each($handle)) {
$this->file[$h] = $this->filename($f);
}
}
}

/* public: set_block(string $parent, string $handle, string $name = "")
* extract the template $handle from $parent,
* place variable {$name} instead.
*/
function set_block($parent, $handle, $name = "") {
if (!$this->loadfile($parent)) {
$this->halt("subst: unable to load $parent.");
return false;
}
if ($name == "")
$name = $handle;

$str = $this->get_var($parent);
$reg = "/<!--s+BEGIN $handles+-->(.*)\ns*<!--s+END $handles+-->/sm";
preg_match_all($reg, $str, $m);
$str = preg_replace($reg, "{" . "$name}", $str);
$this->set_var($handle, $m[1][0]);
$this->set_var($parent, $str);
}

/* public: set_var(array $values)
* values: array of variable name, value pairs.
*
* public: set_var(string $varname, string $value)
* varname: name of a variable that is to be defined
* value: value of that variable
*/
function set_var($varname, $value = "") {
if (!is_array($varname)) {
if (!empty($varname))
if ($this->debug) echo "scalar: set *$varname* to *$value*<br>\n";
$this->varkeys[$varname] = "/".$this->varname($varname)."/";
$this->varvals[$varname] = $value;
} else {
reset($varname);
while(list($k, $v) = each($varname)) {
if (!empty($k))
if ($this->debug) echo "array: set *$k* to *$v*<br>\n";
$this->varkeys[$k] = "/".$this->varname($k)."/";
$this->varvals[$k] = $v;
}
}
}

/* public: subst(string $handle)
* handle: handle of template where variables are to be substituted.
*/
function subst($handle) {
if (!$this->loadfile($handle)) {
$this->halt("subst: unable to load $handle.");
return false;
}

$str = $this->get_var($handle);
$str = @preg_replace($this->varkeys, $this->varvals, $str);
return $str;
}

/* public: psubst(string $handle)
* handle: handle of template where variables are to be substituted.
*/
function psubst($handle) {
echo $this->subst($handle);

return false;
}

/* public: parse(string $target, string $handle, boolean append)
* public: parse(

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