简单的一个php数组函数,之前没这个需要一直都不知道有这么一个函数,擦汗...
php数组逆序输出代码
代码如下 | 复制代码 |
foreach(array_reverse($array) AS $key=>$value){ echo $value.' '; } |
array_reverse
(PHP 4, PHP 5)
array_reverse — 返回一个单元顺序相反的数组
说明
array array_reverse ( array $array [, bool $preserve_keys ] )
array_reverse() 接受数组 array 作为输入并返回一个单元为相反顺序的新数组,如果 preserve_keys 为 TRUE 则保留原来的键名。
Example #1 array_reverse() 例子
代码如下 | 复制代码 |
<?php $input = array("php", 4.0, array("green", "red")); $result = array_reverse($input); $result_keyed = array_reverse($input, TRUE); ?> |
这将使 $result 和 $result_keyed 具有相同的单元,但是注意键名的区别。$result 和 $result_keyed 的打印输出显示分别为:
Array
(
[0] => Array
(
[0] => green
[1] => red
)
[1] => 4
[2] => php
)
Array
(
[2] => Array
(
[0] => green
[1] => red
)
[1] => 4
[0] => php
)
例子,在PHP模板引擎中
模板文件:
代码如下 | 复制代码 |
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>{$web_tile}</title> </head> <body> {$article_title} <br/> -- by {$author} <hr/> <br/> {$content} <br/> -- publish @ {$time} <br/> {foreach ( from=url key=b item=c )} <br/> </body> |
解析引擎:
代码如下 | 复制代码 |
// var $pattern_var = "/{$left_tag}\\$([\w\d]+){$right_tag}/"; $replace_var = '<?php echo \$this->var_tpl_arr["$1"];?>'; if (preg_match($pattern_var, $content)) { $content = preg_replace($pattern_var, $replace_var, $content); } // foreach preg_match_all("/{$left_tag}foreach\s+([^{]+?){$right_tag}/is", $content, $match_foreach); if (isset($match_foreach[1]) && is_array($match_foreach)) { foreach($match_foreach[1] as $match_key => $match_value) { $split_foreachs = array_filter(preg_split('/\s+/is', $match_value)); $new_foreach_tag = array(); foreach($split_foreachs as $split_foreach) { $split = explode("=", $split_foreach); if (count($split == 2)) { if(in_array($split[0], array("from","item","key"))) { //过滤标签 不存在过滤 $new_foreach_tag[$split[0]] = $split[1]; } } } $from = $key = $item = ''; extract($new_foreach_tag); $key = ($key) ? '$'.$key.' =>' : '' ; $replace_foreach = '<?php foreach($this->var_tpl_arr["'.$from.'"] as '.$key.' $'.$item.') { ?>'; $content = str_replace($match_foreach[0][$match_key], $replace_foreach, $content); } } $pattern_foreach = "/{$left_tag}\/foreach{$right_tag}/"; $replace_foreach = "<?php } ?>"; if (preg_match($pattern_foreach, $content)) { $content = preg_replace($pattern_foreach, $replace_foreach, $content); } // var in statement $pattern_var = "/{$left_tag}==([\w\d]+){$right_tag}/"; $replace_var = '<?php echo \$$1;?>'; if (preg_match($pattern_var, $content)) { $content = preg_replace($pattern_var, $replace_var, $content); } |
解析后:
代码如下 | 复制代码 |
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title><?php echo $this->var_tpl_arr["web_tile"];?></title> </head> <body> <?php echo $this->var_tpl_arr["article_title"];?> <br/> -- by <?php echo $this->var_tpl_arr["author"];?> <hr/> <br/> <?php echo $this->var_tpl_arr["content"];?> <br/> -- publish @ <?php echo $this->var_tpl_arr["time"];?> <br/> <?php foreach($this->var_tpl_arr["url"] as $b => $c) { ?> <br/> </body> |
使用:
代码如下 | 复制代码 |
<?php require_once 'core/YATP.class.php'; $app = new YATP(); $article_title = "yet,it is a simple template engine"; $url = array( $app->assign("article_title",$article_title); // end of script |