给PHPLIB模版加两个函数，解决模版文件内图片、CSS和JS包括路径问题-php手册-php.cn

加了两个函数，用法和原来的一样，具体看代码里面说明。
只是在声明的时候要指定图片的路径，默认为当前目录，也就是PHP文件所在目录。
注意的是图片目录要相对于模版文件目录的，模版文件和图片文件不能在同一级目录下。

* Session Management for PHP3

* Kristian Koehntopp

* $Id: template.inc,v 1.5 2000/07/12 18:22:35 kk Exp $

class Template {

var $classname = "Template";

/* 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 = "";

var $path = ".";

/*********************************/

/* public: Constructor.

* root: template directory.

* unknowns: how to handle unknown variables.

function Template($root = ".", $path = ".", $unknowns = "remove") {

$this->set_root($root);

$this->set_path($path);

$this->set_unknowns($unknowns);

}

/* 设置图片路径

function set_path($path){

if($path == ".") return true;

if (!is_dir($this->root . "/" . $path)) {

$this->halt("set_path: $path is not a directory.");

return false;

}

$this->path = $path;

return true;

}

/* 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 = "/(.*)\ns*/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);

$this->set_var($name);

}

/* 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 ($this->debug) print "scalar: set *$varname* to *$value*
\n";

$this->varkeys[$varname] = "/".$this->varname($varname)."/";

$this->varvals[$varname] = $value;

} else {

reset($varname);

while(list($k, $v) = each($varname)) {

if (!empty($k))

if ($this->debug) print "array: set *$k* to *$v*
\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) {

print $this->subst($handle);

return false;

}

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

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

* target: handle of variable to generate

* handle: handle of template to substitute

* append: append to target handle

function parse($target, $handle, $append = false) {

if (!is_array($handle)) {

$str = $this->subst($handle);

if ($append) {

$this->set_var($target, $this->get_var($target) . $str);

} else {

$this->set_var($target, $str);

}

} else {

reset($handle);

while(list($i, $h) = each($handle)) {

$str = $this->subst($h);

$this->set_var($target, $str);

}

return $str;

}

function pparse($target, $handle, $append = false) {

print $this->parse($target, $handle, $append);

return false;

}

/* public: get_vars()

function get_vars() {

reset($this->varkeys);

while(list($k, $v) = each($this->varkeys)) {

$result[$k] = $this->varvals[$k];

}

return $result;

}

/* public: get_var(string varname)

* varname: name of variable.

* public: get_var(array varname)

* varname: array of variable names

function get_var($varname) {

if (!is_array($varname)) {

return $this->varvals[$varname];

} else {

reset($varname);

while(list($k, $v) = each($varname)) {

$result[$k] = $this->varvals[$k];

}

return $result;

}

/* public: get_undefined($handle)

* handle: handle of a template.

function get_undefined($handle) {

if (!$this->loadfile($handle)) {

$this->halt("get_undefined: unable to load $handle.");

return false;

}

preg_match_all("/{([^}]+)}/", $this->get_var($handle), $m);

$m = $m[1];

if (!is_array($m))

return false;

reset($m);

while(list($k, $v) = each($m)) {

if (!isset($this->varkeys[$v]))

$result[$v] = $v;

}

if (count($result))

return $result;

else

return false;

}

/* public: finish(string $str)

* str: string to finish.

function finish($str) {

switch ($this->unknowns) {

case "keep":

break;

case "remove":

$str = preg_replace('/{[^ \t\r\n}]+}/', "", $str);

break;

case "comment":

$str = preg_replace('/{([^ \t\r\n}]+)}/', "", $str);

break;

}

return $str;

}

/* public: p(string $varname)

* varname: name of variable to print.

function p($varname) {

print $this->finish($this->get_var($varname));

}

function get($varname) {

return $this->finish($this->get_var($varname));

}

/********************************/

/* private: filename($filename)

* filename: name to be completed.

function filename($filename) {

if (substr($filename, 0, 1) != "/") {

$filename = $this->root."/".$filename;

}

if (!file_exists($filename))

$this->halt("filename: file $filename does not exist.");
return $filename;

}

/* private: varname($varname)

* varname: name of a replacement variable to be protected.

function varname($varname) {

return preg_quote("{".$varname."}");

}

/* private: loadfile(string $handle)

* handle: load file defined by handle, if it is not loaded yet.

function loadfile($handle) {

if (isset($this->varkeys[$handle]) and !empty($this->varvals[$handle]))

return true;

if (!isset($this->file[$handle])) {

$this->halt("loadfile: $handle is not a valid handle.");

return false;

}

$filename = $this->file[$handle];

$str = implode("", @file($filename));

if (empty($str)) {

$this->halt("loadfile: While loading $handle, $filename does not exist or is empty.");

return false;

}

$str = $this->parsepath($str);//替换图片路径

$this->set_var($handle, $str);

return true;

}

/* 重新分析替换模版目录下指定路径(一般为图片文件路径)

function parsepath($str = ""){

if("/" != substr($this->path, -1)){

$this->path .= "/";

}

if("./" == $this->path) return $str;

$str = preg_replace("|".$this->path."|", $this->root."/".$this->path, $str);

return $str;

}

/**********************/

/* public: halt(string $msg)

* msg: error message to show.

function halt($msg) {

$this->last_error = $msg;

if ($this->halt_on_error != "no")

$this->haltmsg($msg);

if ($this->halt_on_error == "yes")

die("Halted.");

return false;

}

/* public, override: haltmsg($msg)

* msg: error message to show.

function haltmsg($msg) {

printf("Template Error: %s
\n", $msg);

}

//这个声明表明moban目录和img目录在同一级目录下

$t = new Template("moban", "../img");

$t = new Template("moban", "img");