UCHome二次开发】模板解析
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发布时间:2010/4/24
浏览次数:674
UCHome模板文件位于/template文件夹下,每个模板文件单独一个文件夹,默认模板文件夹为default。
1、模板的使用配置
在根目录下的config.php中进行配置,确定系统使用的模板,如下:
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$_SC [ 'template' ] = 'default' ; |
2、模板的处理
程序中使用到模板文件时,先去模板缓存目录/data/tpl_cache/下查找是否存储模板缓存文件。模板缓存文件命名合适为“template_模板目录名_模板文件名.php”。如存在则直接使用该缓存的模板文件;如不存在,则先解析对应的模板文件,生成模板缓存文件再进行使用。
3、模板的解析
模板解析是调用/source目录下的function_template.php文件中的parse_template函数来实现的。
解析过程并不复杂,主要是读取模板文件(.htm),用正则表达式替换标记为对应的PHP代码,最终生成一个标准的PHP文件,保存到模板缓存目录/data/tpl_cache/供后续使用。
具体的模板解析过程不做说明,直接查看代码即可。
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function parse_template( $tpl ) { |
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$_SGLOBAL [ 'sub_tpls' ] = array ( $tpl ); |
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$tplfile = S_ROOT. './' . $tpl . '.htm' ; |
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$objfile = S_ROOT. './data/tpl_cache/' . str_replace ( '/' , '_' , $tpl ). '.php' ; |
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$template = sreadfile( $tplfile ); |
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if ( empty ( $template )) { |
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exit ( "Template file : $tplfile Not found or have no access!" ); |
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$template = preg_replace( "/\<\!\-\-\{template\s+([a-z0-9_\/]+)\}\-\-\>/ie" , "readtemplate('\\1')" , $template ); |
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$template = preg_replace( "/\<\!\-\-\{template\s+([a-z0-9_\/]+)\}\-\-\>/ie" , "readtemplate('\\1')" , $template ); |
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$template = preg_replace( "/\<\!\-\-\{block\/(.+?)\}\-\-\>/ie" , "blocktags('\\1')" , $template ); |
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$template = preg_replace( "/\<\!\-\-\{ad\/(.+?)\}\-\-\>/ie" , "adtags('\\1')" , $template ); |
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$template = preg_replace( "/\<\!\-\-\{date\((.+?)\)\}\-\-\>/ie" , "datetags('\\1')" , $template ); |
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$template = preg_replace( "/\<\!\-\-\{avatar\((.+?)\)\}\-\-\>/ie" , "avatartags('\\1')" , $template ); |
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$template = preg_replace( "/\<\!\-\-\{eval\s+(.+?)\s*\}\-\-\>/ies" , "evaltags('\\1')" , $template ); |
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$var_regexp = "((\\\$[a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)(\[[a-zA-Z0-9_\-\.\"\'\[\]\$\x7f-\xff]+\])*)" ; |
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$template = preg_replace( "/\<\!\-\-\{(.+?)\}\-\-\>/s" , "{\\1}" , $template ); |
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$template = preg_replace( "/([\n\r]+)\t+/s" , "\\1" , $template ); |
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$template = preg_replace( "/(\\\$[a-zA-Z0-9_\[\]\'\"\$\x7f-\xff]+)\.([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)/s" , "\\1['\\2']" , $template ); |
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$template = preg_replace( "/\{(\\\$[a-zA-Z0-9_\[\]\'\"\$\.\x7f-\xff]+)\}/s" , "<?=\\1?>" , $template ); |
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$template = preg_replace( "/$var_regexp/es" , "addquote('<?=\\1?>')" , $template ); |
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$template = preg_replace( "/\<\?\=\<\?\=$var_regexp\?\>\?\>/es" , "addquote('<?=\\1?>')" , $template ); |
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$template = preg_replace( "/\{elseif\s+(.+?)\}/ies" , "stripvtags('<?php } elseif(\\1) { ?>','')" , $template ); |
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$template = preg_replace( "/\{else\}/is" , "<?php } else { ?>" , $template ); |
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for ( $i = 0; $i < 5; $i ++) { |
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$template = preg_replace( "/\{loop\s+(\S+)\s+(\S+)\}(.+?)\{\/loop\}/ies" , "stripvtags('<?php if(is_array(\\1)) { foreach(\\1 as \\2) { ?>','\\3<?php } } ?>')" , $template ); |
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$template = preg_replace( "/\{loop\s+(\S+)\s+(\S+)\s+(\S+)\}(.+?)\{\/loop\}/ies" , "stripvtags('<?php if(is_array(\\1)) { foreach(\\1 as \\2 => \\3) { ?>','\\4<?php } } ?>')" , $template ); |
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$template = preg_replace( "/\{if\s+(.+?)\}(.+?)\{\/if\}/ies" , "stripvtags('<?php if(\\1) { ?>','\\2<?php } ?>')" , $template ); |
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$template = preg_replace( "/\{([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)\}/s" , "<?=\\1?>" , $template ); |
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if (! empty ( $_SGLOBAL [ 'block_search' ])) { |
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$template = str_replace ( $_SGLOBAL [ 'block_search' ], $_SGLOBAL [ 'block_replace' ], $template ); |
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$template = preg_replace( "/ \?\>[\n\r]*\<\? /s" , " " , $template ); |
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$template = "<?php if(!defined('IN_UCHOME')) exit('Access Denied');?><?php subtplcheck('" .implode('| ', $_SGLOBAL[' sub_tpls '])."' , '$_SGLOBAL[timestamp]' , '$tpl' );?> $template <?php ob_out();?>"; |
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if (!swritefile( $objfile , $template )) { |
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exit ( "File: $objfile can not be write!" ); |