PHP教程之class.rFastTemplate.php（三）
小试一下身手，大概是没问题了，那么交给你个任务，做个留言本吧，这和HELLO WORLD有一比啊!^_^，同是新手面临的第一道关。 //// Description
// Perform substitution on the template.We do not really recurse
// downward in the sense that we do not do subsitutions on inferior
// templates.For each inferior template which is a part of this
// template, we insert the current value of their results.
//
// Notes
// Do I want to make this return a reference?
function subst ($handle, $tag, $autoload = true) {
$append = false;
$debug = $this->DEBUGALL || $this->DEBUG['subst'];
$this->LAST = $handle;
if ($debug)
$this->logwrite ("subst (handle=$handle, tag=$tag, autoload=$autoload)");
// For compatibility with FastTemplate, the results need to overwrite
// for an array.This really only seems to be useful in the case of
// something like
// $t->parse ('MAIN', array ('array', 'main'));
// Where the 'main' template has a variable named MAIN which will be
// set on the first pass (i.e., when parasing 'array') and used on the
// second pass (i.e., when parsing 'main').
if (gettype($tag) == 'array') {
foreach (array_values($tag) as $t) {
if ($debug)
$this->logwrite ("subst: calling subst($handle,$t,$autoload)");
$this->subst ($handle, $t, $autoload);
}
return $this->HANDLE[$handle];
}
// Period prefix means append result to pre-existing value.
if (substr($tag,0,1) == '.') {
$append = true;
$tag = substr ($tag, 1);
if ($debug)
$this->logwrite ("subst (handle=$handle, tag=$tag, autoload=$autoload) in append mode");
}
// $this->TEMPLATE[$tag] will only be set if it was explicitly
// declared via define(); i.e., inferior templates will not have an
// entry.
if (isset($this->TEMPLATE[$tag])) {
if (!isset($this->TEMPLATE[$tag]['parsed'])
|| !$this->TEMPLATE[$tag]['parsed'])
$this->parse_internal ($tag);
} else {
if (!$this->DYNAMIC) {
$this->error ("subst (handle=$handle, tag=$tag, autoload=$autoload): " .
'no such tag and dynamic templates are turned off', true);
}
if ($autoload) {
if ($debug)
$this->logwrite ("subst: TEMPLATE not found, trying autoload");
foreach (array_keys($this->TEMPLATE) as $t) {
if ($debug)
$this->logwrite ("subst: calling parse_internal (tag=$t)");
if (!isset($this->TEMPLATE[$tag]['parsed'])
|| !$this->TEMPLATE[$tag]['parsed'])
$this->parse_internal ($t);
}
if ($debug)
$this->logwrite ('subst: retrying with autoload = false');
$this->subst ($handle, $tag, false);
if ($debug)
$this->logwrite ('subst: completed with autoload = false');
return;
} else {
$this->error ("subst (handle=$handle, tag=$tag, autoload=$autoload):no such tag", true);
}
}
if (!$append) {
$this->TEMPLATE[$tag]['result'] = '';
if ($debug)
$this->logwrite ("subst (handle=$handle, tag=$tag, autoload=$autoload) in overwrite mode");
}
if ($debug)
$this->logwrite ('subst: type(this->TEMPLATE[$tag][\'part\']) => ' .
gettype($this->TEMPLATE[$tag]['part']));
// Hmmm, clear() called before subst() seems to result in this not
// being defined which leaves me a bit confused....
$result = '';
if (isset($this->TEMPLATE[$tag]['part'])) {
reset ($this->TEMPLATE[$tag]['part']);
foreach (array_keys($this->TEMPLATE[$tag]['part']) as $p) {
if ($debug)
$this->logwrite ("subst: looking at TEMPLATE[$tag]['part'][$p]");
$tmp = $this->TEMPLATE[$tag]['part'][$p];
// Don't try if ($p == 'parent')....
if (strcmp ($p, 'parent') == 0) {
if ($debug)
$this->logwrite ("subst: skipping part $p");
$tmp = '';
} else if (gettype($this->TEMPLATE[$tag]['part'][$p]) == 'string') {
if ($debug)
$this->logwrite ("subst: using part $p");
reset ($this->VAR);
// Because we treat VAR and HANDLE separately (unlike
// class.FastTemplate.php3), we have to iterate over both or we
// miss some substitutions and are not 100% compatible.
while (list($key,$val) = each ($this->VAR)) {
if ($debug)
$this->logwrite ("subst: substituting VAR $key = $val in $tag");
$key = '{'.$key.'}';
$tmp = str_replace ($key, $val, $tmp);
}
reset ($this->HANDLE);
while (list($key,$val) = each ($this->HANDLE)) {
if ($debug)
$this->logwrite ("subst: substituting HANDLE $key = $val in $tag");
$key = '{'.$key.'}';
$tmp = str_replace ($key, $val, $tmp);
}
$result .= $tmp;
} else {
$xtag = $this->TEMPLATE[$tag]['part'][$p]['tag'];
if ($debug) {
$this->logwrite ("subst: substituting other tag $xtag result in $tag");
}
// The assignment is a no-op if the result is not set, but when
// E_ALL is in effect, a warning is generated without the
// isset() test.
if (isset ($this->TEMPLATE[$xtag]['result']))
$result .= $this->TEMPLATE[$xtag]['result'];
}
}
}
if ($this->STRICT) {
// If quiet-mode is turned on, skip the check since we're not going
// to do anything anyway.
if (!$this->QUIET) {
if (preg_match ($this->REGEX_VAR, $result)) {
$this->error ("<B>unmatched tags still present in $tag</B><BR />");
}
}
} else {
$result = preg_replace ($this->REGEX_VAR, '', $result);
}
if ($append) {
if ($debug) {
$this->logwrite ("subst: appending TEMPLATE[$tag]['result'] = $result");
$this->logwrite ("subst: old HANDLE[$handle] = {$this->HANDLE[$handle]}");
$this->logwrite ("subst: old TEMPLATE[$tag]['result'] = {$this->TEMPLATE[$tag]['result']}");
}
// The isset() tests are to suppresss warning when E_ALL is in effect
// and the variables have not actually been set yet (even though the
// user specified append-mode).
if (isset ($this->HANDLE[$handle]))
$this->HANDLE[$handle] .= $result;
else
$this->HANDLE[$handle] = $result;
if (isset ($this->TEMPLATE[$tag]['result']))
$this->TEMPLATE[$tag]['result'] .= $result;
else
$this->TEMPLATE[$tag]['result'] = $result;
if ($debug) {
$this->logwrite ("subst: new HANDLE[$handle] = {$this->HANDLE[$handle]}");
$this->logwrite ("subst: new TEMPLATE[$tag]['result'] = {$this->TEMPLATE[$tag]['result']}");
}
} else {
if ($debug)
$this->logwrite ("subst: setting TEMPLATE[$tag]['result'] = $result");
$this->HANDLE[$handle]= $result;
$this->TEMPLATE[$tag]['result'] = $result;
}
return $this->HANDLE[$handle];
}
//
// Description
// Clear a block from a template.The intent is to remove an inferior
// template from a parent.This works even if the template has already
// been parsed since we go straight to the specified template and clear
// the results element.If the given template has not yet been
// loaded, the load is forced by calling parse_internal().
//
function clear_dynamic ($tag = NULL) {
$debug = $this->DEBUGALL || $this->DEBUG['clear_dynamic'];
if (is_null ($tag)) {
// Clear all result elements.Uhm, needs to be tested.
if ($debug)
$this->logwrite ("clear_dynamic (NULL)");
foreach (array_values ($this->TEMPLATE) as $t) {
$this->clear_dynamic ($t);
}
return;
} else if (gettype($tag) == 'array') {
if ($debug)
$this->logwrite ("clear_dynamic ($tag)");
foreach (array_values($tag) as $t) {
$this->clear_dynamic ($t);
}
return;
}
else if (!isset($this->TEMPLATE[$tag])) {
if ($debug)
$this->logwrite ("clear_dynamic ($tag) --> $tag not set, calling parse_internal");
$this->parse_internal ($tag);
// $this->TEMPLATE[$tag] = array ();
}
if ($debug)
$this->logwrite ("clear_dynamic ($tag)");
// $this->TEMPLATE[$tag]['loaded']= true;
// $this->TEMPLATE[$tag]['string']= '';
$this->TEMPLATE[$tag]['result'] = '';
// $this->TEMPLATE[$tag]['clear'] = true;
}
//
// Description
// Clear the results of a handle set by parse().The input handle can
// be a single value, an array, or the PHP constant NULL.For the
// last case, all handles cleared.
//
function clear ($handle = NULL) {
$debug = $this->DEBUGALL || $this->DEBUG['clear'];
if (is_null ($handle)) {
// Don't bother unsetting them, just set the whole thing to a new,
// empty array.
if ($debug)
$this->logwrite ("clear (NULL)");
$this->HANDLE = array ();
} else if (gettype ($handle) == 'array') {
if ($debug)
$this->logwrite ("clear ($handle)");
foreach (array_values ($handle) as $h) {
$this->clear ($h);
}
} else if (isset ($this->HANDLE[$handle])) {
if ($debug)
$this->logwrite ("clear ($handle)");
unset ($this->HANDLE[$handle]);
}
}
//
// Description
// Clears all information associated with the specified tag as well as
// any information associated with embedded templates.This will force
// the templates to be reloaded on the next call to subst().
// Additionally, any results of previous calls to subst() will also be
// cleared.
//
// Notes
// This leaves dangling references in $this->HANDLE.Or does PHP do
// reference counting so they are still valid?
//
function unload ($tag) {
if (!isset($this->TEMPLATE[$tag]))
return;
if (isset ($this->TEMPLATE[$tag]['parent'])) {
$ptag = $this->TEMPLATE[$tag]['parent'];
foreach (array_keys($this->TEMPLATE) as $t) {
if ($this->TEMPLATE[$t]['parent'] == $ptag) {
unset ($this->TEMPLATE[$t]);
}
}
}
unset ($this->TEMPLATE[$tag]);
return;
}
//
// Description
// class.FastTemplate.php3 compatible interface.
//
function assign ($tplkey, $rest = '') {
$this->setkey ($tplkey, $rest);
}
//
// Description
// Set a (key,value) in our internal variable array.These will be
// used during the substitution phase to replace template variables.
//
function setkey ($tplkey, $rest = '') {
if (gettype ($tplkey) == 'array') {
reset ($tplkey);
while (list($key,$val) = each ($tplkey)) {
if (!empty($key)) {
$this->VAR[$key] = $val;
}
}
} else {
if (!empty($tplkey)) {
$this->VAR[$tplkey] = $rest;
}
}
}
//
// Description
// class.FastTemplate.php3 compatible interface
//
function get_assigned ($key = '') {
return $this->getkey ($key);
}
//
// Description
// Retrieve a value from our internal variable array given the key name.
//
function getkey ($key = '') {
if (empty($key)) {
return false;
} else if (isset ($this->VAR[$key])) {
return $this->VAR[$key];
} else {
return false;
}
}
function fetch ($handle = '') {
if (empty($handle)) {
$handle = $this->LAST;
}
return $this->HANDLE[$handle];
}
function xprint ($handle = '') {
if (empty($handle)) {
$handle = $this->LAST;
}
print ($this->HANDLE[$handle]);
}
function FastPrint ($handle = '') {
$this->xprint ($handle);
}
function clear_href ($key = '') {
$this->unsetkey ($key);
}
function unsetkey ($key = '') {
if (empty($key)) {
unset ($this->VAR);
$this->VAR = array ();
} else if (gettype($key) == 'array') {
reset ($key);
foreach (array_values($key) as $k) {
unset ($this->VAR[$k]);
}
} else {
unset ($this->VAR[$key]);
}
}
function define_nofile ($stringList, $dynamic = 0) {
$this->define_raw ($stringList, $dynamic);
}
//
// Description
// Member function to control explicit error messages.We don't do
// real PHP error handling.
//
function error ($errorMsg, $die = 0) {
$this->ERROR = $errorMsg;
echo "ERROR: {$this->ERROR} <br /> \n";
if ($die) {
exit;
}
return;
}
}
//全体停止多个成员之间重复做相同的工作，很容易因为交流沟通的时候没有进行一致性的文档要求而出现不明错误，严重影响开发进度，导致在预定时间内无法完成该项目或者完成的项目跟原先计划所要实现的项目功能不符合。 基础有没有对学习php没有太大区别，关键是兴趣。 遇到出错的时候，我经常把错误信息直接复制到 google的搜索栏，一般情况都是能搜到结果的，不过有时候会搜出来一大片英文的出来，这时候就得过滤一下，吧中文的弄出来，挨着式方法。 再就是混迹于论坛啦，咱们的phpchina的论坛就很强大，提出的问题一般都是有达人去解答的，以前的帖子也要多看看也能学到不少前辈们的经验。别的不错的论坛例如php100，javaeye也是很不错的。 没接触过框架的人，也不用害怕，其实框架就是一种命名规范及插件，学会一个框架其余的框架都很好上手的。 找到的的资料很多都是在论坛里的，需要注册，所以我一般没到一个论坛都注册一个id，所有的id都注册成一样的，这样下次再进来的时候就不用重复注册啦。当然有些论坛的某些资料是需要的付费的。 多看优秀程序员编写的代码，仔细理解他们解决问题的方法，对自身有很大的帮助。 对于初学者来说不推荐去拿钱买的。当然如果一个网站你经常去用，而且里面的资料也比较有用，最好还是买个会员比较好，毕竟那些也是别人的工作成果。 我还是强烈建议自己搭建php环境。因为在搭建的过程中你会遇到一些问题，通过搜索或是看php手册解决问题后，你会更加深刻的理解它们的工作原理，了解到php配置文件中的一些选项设置。 在我安装pear包的时候老是提示，缺少某某文件，才发现 那群extension 的排列是应该有一点的顺序，而我安装的版本的排序不是正常的排序。没办法我只好把那群冒号加了上去，只留下我需要使用的扩展。 作为一个合格的coder 编码的规范是必须，命名方面我推崇“驼峰法”，另外就是自己写的代码最好要带注释，不然时间长了，就算是自己的代码估计看起来都费事，更不用说别人拉。 本文当是我的笔记啦，遇到的问题随时填充 我还是强烈建议自己搭建php环境。因为在搭建的过程中你会遇到一些问题，通过搜索或是看php手册解决问题后，你会更加深刻的理解它们的工作原理，了解到php配置文件中的一些选项设置。 多看优秀程序员编写的代码，仔细理解他们解决问题的方法，对自身有很大的帮助。 当然这种网站的会员费就几十块钱。 刚开始安装php的时候，我图了个省事，把php的扩展全都打开啦（就是把php.ini 那一片 extension 前面的冒号全去掉啦），这样自然有好处，以后不用再需要什么功能再来打开。 我要在声明一下：我是个菜鸟！！我对php这门优秀的语言也是知之甚少。但是我要在这里说一下php在网站开发中最常用的几个功能： 说点我烦的低级错误吧，曾经有次插入mysql的时间 弄了300年结果老报错，其实mysql的时间是有限制的，大概是到203X年具体的记不清啦，囧。 建议加几个专业的phper的群，当然啦需要说话的人多，一处一点问题能有人回答你的，当然啦要让人回答你的问题，平时就得躲在里面聊天，大家混熟啦，愿意回答你问题的人自然就多啦。 使用 jquery 等js框架的时候，要随时注意浏览器的更新情况，不然很容易发生框架不能使用。
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