Template class not looping with str_replace

问题

Well i have this set of codes

<?php
include "includes/config.php";
class template{
    var $page;
    var $built;
    public $block = array();

    function _start($tpl){
        $this->page = $tpl;
    }

    function set_array($data){
        $this->block[] = $data;
    }

    function _show(){
        foreach($this->block as $k => $v){
            foreach($v as $k1 => $v1){
                //echo $k1."<br />";
                //echo $v1."<br />";
                $this->page = str_replace("{".$k1."}", $v1, $this->page);
            }
        }
        echo $this->page;
    }
}

$template = new template();

$file = "<html>
<body>
<p>{CAT}</p>
<p>{SUBCAT}</p>
</body>
</html>";

$template->_start($file);

// Category Query
while($row1 = mysql_fetch_assoc($cat)){

$template->set_array(array("CAT" => $row1['title']));

// Sub Category Query
while($row2 = mysql_fetch_assoc($subcat)){

$template->set_array(array("SUBCAT" => $row2['title']));

}
}

$template->_show();

?>

Now, when i echo $k1 or $v1 they display the keys and values in the correct order like

CAT1 SUBCAT1.1 SUBCAT1.2 CAT2 SUBCAT2.1 SUBCAT2.2

but when it goes through the str_replace its only displays the CAT1 and SUBCAT1.2 what going wrong?

回答1:

You're overwriting the variable $page inside the foreach() loop; either you make it an array or you append to the variable. Could be:

function _show(){
       $this->page = '';
        foreach($this->block as $k => $v){
            foreach($v as $k1 => $v1){
                $this->page .= str_replace("{".$k1."}", $v1, $this->page); //appending every time onto the previous. As you were doing:
                // $this->page =str_replace("{".$k1."}", $v1, $this->page);
                // here you were overwriting $this->page at every passage of the loop
            }
        }
        echo $this->page;
    }

来源：https://stackoverflow.com/questions/7709355/template-class-not-looping-with-str-replace

标签

php

foreach

while-loop

str-replace