$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);

}

<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}

<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/>

<br/>

<?php if($this->var_tpl_arr["var_left"] < 5) { ?>

<b>if < 条件成立！</b>

<?php } ?>;

<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 } ?>;