discuz模板解析注释
代码 1 <?php 2 3 function parse_template($tplfile, $objfile) { 4 global $options; 5 6 //循环嵌套次数 7 $nest = 3; 8 9 //打开模板文件 10 if(!$fp = fopen($tplfile, ‘rb’)) { 11 exit(’Current template file not found or have no access!’); 12 } 13 14 $template = fread($fp, filesize($tplfile)); 15 fclose($fp); 16 17 //匹配变量 18 //双引号(单引号)内的具有转义所以，要得到一个必须写为\；要得到一个$必须写为$;最后结果为$,可在正则中使用的变量符号 19 $var_regexp = “((\$[a-zA-Z_x7f-xff][a-zA-Z0-9_x7f-xff]*)([[a-zA-Z0-9_-.”’[]$x7f-xff]+])*)”; 20 21 //匹配字符 22 $const_regexp = “([a-zA-Z_x7f-xff][a-zA-Z0-9_x7f-xff]*)”; 23 24 //清除缩进(tab) 25 $template = preg_replace(”/([nr]+)t+/s”, “\1“, $template); 26 27 //清除注释(<!– –>),方便后续操作，不需要匹配多余的<!– 28 $template = preg_replace(”/<!--{(.+?)}-->/s”, “{\1}”, $template); 29 30 //将{LF}替换成一个硬回车(n) 31 $template = str_replace(”{LF}”, “<?=”\n“?>”, $template); 32 33 //匹配多种变量形式，包括$xxx[”xxxx”]与$xxx[$xxx]、或$xxx 34 $template = preg_replace(”/{(\$[a-zA-Z0-9_[]’”$.x7f-xff]+)}/s”, “<?=\1?>”, $template); 35 36 //使用/e修正符，可使替换元素以php代码执行后，再进行replace. 37 $template = preg_replace(”/$var_regexp/es”, “addquote(’<?=\1?>’)”, $template); 38 39 //再次替换叠加字符串变量 40 $template = preg_replace(”/<?=<?=$var_regexp?>?>/es”, “addquote(’<?=\1?>’)”, $template); 41 42 //子模板嵌套解析 43 $template = preg_replace(”/[nrt]*{templates+([a-z0-9_]+)}[nrt]*/is”, “n<? include template(’\1′); ?>n”, $template); 44 $template = preg_replace(”/[nrt]*{templates+(.+?)}[nrt]*/is”, “n<? include template(\1); ?>n”, $template); 45 46 //eval语法解析 47 $template = preg_replace(”/[nrt]*{evals+(.+?)}[nrt]*/ies”, “stripvtags(’n<? \1; ?>n’,”)”, $template); 48 49 //echo语法解析 50 $template = preg_replace(”/[nrt]*{echos+(.+?)}[nrt]*/ies”, “stripvtags(’n<? echo \1; ?>n’,”)”, $template); 51 52 //elseif语法解析 53 $template = preg_replace(”/[nrt]*{elseifs+(.+?)}[nrt]*/ies”, “stripvtags(’n<? } elseif(\1) { ?>n’,”)”, $template); 54 55 //else语法解析 56 $template = preg_replace(”/[nrt]*{else}[nrt]*/is”, “n<? } else { ?>n”, $template); 57 58 for($i = 0; $i < $nest; $i++) { 59 $template = preg_replace(”/[nrt]*{loops+(S+)s+(S+)}[nr]*(.+?)[nr]*{/loop}[nrt]*/ies”, “stripvtags(’n<? if(is_array(\1)) { foreach(\1 as \2) { ?>’,'n\3n<? } } ?>n’)”, $template); 60 $template = preg_replace(”/[nrt]*{loops+(S+)s+(S+)s+(S+)}[nrt]*(.+?)[nrt]*{/loop}[nrt]*/ies”, “stripvtags(’n<? if(is_array(\1)) { foreach(\1 as \2 => \3) { ?>’,'n\4n<? } } ?>n’)”, $template); 61 $template = preg_replace(”/[nrt]*{ifs+(.+?)}[nr]*(.+?)[nr]*{/if}[nrt]*/ies”, “stripvtags(’n<? if(\1) { ?>’,'n\2n<? } ?>n’)”, $template); 62 } 63 64 //常量直接输出.. 65 $template = preg_replace(”/{$const_regexp}/s”, “<?=\1?>”, $template); 66 67 //相临定界符清除(使语法更加连贯) 68 $template = preg_replace(”/ ?>[nr]*<? /s”, ” “, $template); 69 70 if(!@$fp = fopen($objfile, ‘wb’)) { 71 exit(’Directory ’./cache/template/’ not found or have no access!’); 72 } 73 74 //转换链接中的&符号为&使编译模板读取时能够正常不会将其视为引用.. 75 $template = preg_replace(”/”(http)?[w./:]+?[^”]+?&[^”]+?”/e”, “transamp(’\0′)”, $template); 76 77 flock($fp, 2); 78 fwrite($fp, $template); 79 fclose($fp); 80 } 81 82 //转换&避免&以引用方式执行.. 83 function transamp($str) { 84 $str = str_replace(’&’, ‘&’, $str); 85 $str = str_replace(’&’, ‘&’, $str); 86 $str = str_replace(’”‘, ‘”‘, $str); 87 return $str; 88 } 89 90 //将$var字符串，转换为可执行的php代码形式,并返回其结果.. 91 //”转换为”,将为[xxx]转换为[’xxx’] 92 function addquote($var) { 93 return str_replace(”\”", “”", preg_replace(”/[([a-zA-Z0-9_-.x7f-xff]+)]/s”, “[’\1′]”, $var)); 94 } 95 96 //设置语言变量 97 function languagevar($var) { 98 return $GLOBALS[’language’][$var] ? $GLOBALS[’language’][$var] : “!$var!”; 99 }100 //清理或转换标签为php语法101 function stripvtags($expr, $statement) {102 $expr = str_replace(”\”", “”", preg_replace(”/<?=(\$.+?)?>/s”, “\1“, $expr));103 $statement = str_replace(”\”", “”", $statement);104 return $expr.$statement;105 }106 107 ?>
