用法：
{if}{/if}
{if} {else}{/else}{/if}
解析引擎：
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代码如下 |
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// if
$if_operators = array(">","<","==","===",">=","<=","!=","!==");
$is_operator = false;
$pattern_if = "/{$left_tag}ifs+((.*?)){$right_tag}/";
preg_match_all($pattern_if,$content,$match_if);
if (isset($match_if[1]) && is_array($match_if[1])) {
foreach ($match_if[1] as $key_if=>$val_if) {
foreach ($if_operators as $if_operator) {
$items = explode($if_operator, $val_if);
if (count($items) == 2) {
$is_operator = true;
$shift_left = substr($items[0], 0,1);
$pop_left = substr($items[0], 1);
$shift_right = substr($items[1], 0,1);
$pop_right = substr($items[1], 1);
$left_var = $shift_left == '$'? '$this->var_tpl_arr["'.$pop_left.'"]':$items[0];
$right_var = $shift_right == '$'?'$this->var_tpl_arr["'.$pop_right.'"]':$items[1];
$content = str_replace($match_if[0][$key_if], "<?php if({$left_var} {$if_operator} {$right_var}) { ?>", $content);
break;
} else {
continue;
}
}
if (!$is_operator) {
$content = str_replace($match_if[0][$key_if], "<?php if({$val_if}) { ?>", $content);
}
}
}
// if close
$pattern_if = "/{$left_tag}/if{$right_tag}/";
$replace_if = "<?php } ?>;";
if (preg_match($pattern_if, $content)) {
$content = preg_replace($pattern_if, $replace_if, $content);
}
// else
$pattern_else = "/{$left_tag}else{$right_tag}/";
$replace_else = "<?php } else { ?>";
if (preg_match($pattern_else, $content)) {
$content = preg_replace($pattern_else, $replace_else, $content);
}
// else close
$pattern_else = "/{$left_tag}/else{$right_tag}/";
$replace_else = "";
if (preg_match($pattern_else, $content)) {
$content = preg_replace($pattern_else, $replace_else, $content);
} |
模板表示方法：
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代码如下 |
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<br/>
<br/>
$var_left == {$var_left},$var_right == {$var_right}<br/><br/>
test if >:$var_left>1
<br/>
{if ($var_left>1)}
<b>if > 条件成立！</b>
{/if}
<br/>
test if <:$var_left<5
<br/>
{if ($var_left<5)}
<b>if < 条件成立！</b>
{/if}
<br/>
test if ==:$var_left==$va_right
<br/>
{if ($var_left==$va_right)}
<b>if == 条件成立！</b>
{else}
<b><font color=red>if = 条件不成立！</font></b>
{/if}
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解析后的缓存文件：
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代码如下 |
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<br/>
<br/>
$var_left == <?php echo $this->var_tpl_arr["var_left"];?>,$var_right == <?php echo $this->var_tpl_arr["var_right"];?><br/><br/>
test if >:$var_left>1
<br/>
<?php if($this->var_tpl_arr["var_left"] > 1) { ?>
<b>if > 条件成立！www.111cn.net</b>
<?php } ?>;
<br/>
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test if
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代码如下 |
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<:$var_left<5
<br/>
<?php if($this->var_tpl_arr["var_left"] < 5) { ?>
<b>if < 条件成立！</b>
<?php } ?>;
<br/> |
test if ==:$var_left==$va_right
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代码如下 |
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<br/>
<?php if($this->var_tpl_arr["var_left"] == $this->var_tpl_arr["va_right"]) { ?>
<b>if == 条件成立！</b>
<?php } else { ?>
<b><font color=red>if == 条件不成立！</b></b>
<?php } ?>;
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