ereg_replace

[Anon]

Hi, I've tried doing this many times and read many tutorials on ereg and ereg_replace but I can't seem to figure this out.

I'm attempting to write a message board script in PHP and I want to allow people to insert images and other things in there messages, however, I don't want all HTML commands allowed.

I want to use tags such as

My question is, how can I change that to <img src="......"> with ereg_replace? Hopefully someone understands what I'm trying to ask 🙂

Thanks,
MarkR

[elfynmcb]

Hey,

I'd recommend using str_replace instead as it's proven to be 25% faster that the preg/ereg (replace) funcs.

I recently created a very basic template system for a client. Although the goal is different the concept is the same. And it doesn't take much to get it working:

file: tmpl.class.php

<?php

class tmpl
{

    // Global Variables
    var $tmpl_type;
    var $tmpl_dir;
    var $tmpl_file;
    var $tmpl_var_tags;
    var $tmpl_func_tags;
    var $tmpl_inc_tags;
    var $tmpl_data;

    // function: tmpl ()
    //
    // Main constructor for class tmpl. Sets up the environment.
    function tmpl()
    {
        $this->tmpl_type = "html";
        $this->tmpl_dir = "/root2/include/php4/tmpl";
        return 1;
    }

    // function: read_tmpl ( string tmpl_file, [ string tmpl_dir ] )
    //
    // Reads in the template file and sets up the requested tags
    function read_template( $tmpl_file,$tmpl_dir='/tmp' )
    {
        if( ! $tmpl_file )
        {
            die("function: read_tmpl() requires a template filename be passed to it.");
        }
        else
        {
            if( ! is_file($tmpl_file) )
            {
                return 0;
            }
        }
        if( $tmpl_dir != $this->tmpl_dir )
        {
            if( ! is_dir($tmpl_dir) )
            {
                return 0;
            }
        }
        $tmpl_fp = fopen("$tmpl_dir/$tmpl_file","r");
        while( ! feof($tmpl_fp) )
        {
            if( $tmpl_data )
            {
                $tmpl_data .= fgets($tmpl_fp,4096);
            }
            else
            {
                $tmpl_data = fgets($tmpl_fp,4096);
            }
        }
        fclose($tmpl_fp);
        preg_match("/<VAR NAME=([A-za-z0-9\.+]) \/>/",$tmpl_data,$tmpl_re_matches);
        foreach( $tmpl_re_matches as $tag => $value )
        {
            $this->add_tag($tag);
        }
        $this->tmpl_data = $tmpl_data;
        return 1;
    }

    // function: set_tag_var ( string tag_name, string tag_content )
    //
    // Set tag $tag_name to $tag_content.
    function set_tag_var( $tag_name,$tag_content )
    {
        if( ! $tag_name )
        {
            die("function: set_tag_var() requires a tag name passed to it.");
        }
        if( ! $tag_content )
        {
            if( ! $tag_name == "QUERY_STRING" )
            {
                die("function: set_tag_var() requires tag content be passed to it.");
            }
        }
        $this->tmpl_var_tags[$tag_name] = $tag_content;
        return 1;
    }

    // function: output ()
    //
    // Output's the whole template with tags filled in.
    function output()
    {
        if( ! $this->tmpl_data )
        {
            die("function: output() cannot be called before read_template().");
        }
        $tmpl_out = $this->$tmpl_data;
        foreach( $this->tmpl_var_tags as $tag => $value )
        {
            if( $value == 1 )
            {
                $this->tmpl_var_tags[$tag] = "Empty Tag ($tag) value.";
            }
            $this->tmpl_data = str_replace("<VAR NAME=$tag />",$this->tmpl_var_tags[$tag],$this->tmpl_data);
        }
        echo $this->tmpl_data;
        return 1;
    }

    // End Class: tmpl
}

?>

file: test-tmpl.php

<?php

// change the error_reporting prefs:
error_reporting(E_ERROR|E_WARNING|E_PARSE);
// require the tmpl class (tmpl.class.php):
require_once("/home/exposu/public_html/elfyn/tmpl.class.php");
// create a new tmpl object:
$tmpl = new tmpl();
// read in the template file (test.tmpl):
$tmpl->read_template("test.tmpl","/home/exposu/public_html/elfyn");

// template variables (e.g. <VAR=xyz />):
$_VARS[TITLE] = "Welcome to my site!";
$_VARS[META_DESCRIPTION] = "Elfyn McBratney's personal homepage.";
$_VARS[META_KEYWORDS] = "elfyn,mcbratney,web,site";
$_VARS[REMOTE_URL] = "http://".$SERVER_NAME.$REQUEST_URI;
if( $QUERY_STRING != "" ) { $_VARS[REMOTE_URL] .= "?".$QUERY_STRING; }
$_VARS[STYLE_BGCOLOR] = "#ffffff";
$_VARS[STYLE_TEXT] = "#000000";
$_VARS[STYLE_LINK] = "#0099ff";
$_VARS[STYLE_FONTFACE] = "verdana,arial,helvetica,geneva";
$_VARS[STYLE_FONTSIZE] = 2;
$_VARS[STYLE_FONTCOLOR] = "#000000";
$_VARS[WELCOME_MSG] = "Welcome to my site. "."\n";
$_VARS[WELCOME_MSG] .= "Click here to visit \n";
$_VARS[WELCOME_MSG] .= "<A HREF=\"http://www.exposure.org.uk\">exposure.org.uk</A>";
foreach( $_VARS as $tag => $value )
{
    $tmpl->set_tag_var($tag,$value);
}
$_VARS = array();
unset($_VARS);

// output the content to the browser
$tmpl->output();

?>

file: test.tmpl

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">

<HTML>
<HEAD>
  <TITLE><VAR NAME=TITLE /></TITLE>
  <META NAME="title" CONTENT="<VAR NAME=TITLE />" />
  <META NAME="description" CONTENT="<VAR NAME=META_DESCRIPTION />" />
  <META NAME="keywords" CONTENT="<VAR NAME=META_KEYWORDS />" />
  <META NAME="remote_url" CONTENT="<VAR NAME=REMOTE_URL />" />
</HEAD>
<BODY BGCOLOR="<VAR NAME=STYLE_BGCOLOR />" TEXT="<VAR NAME=STYLE_TEXT />" LINK="<VAR NAME=STYLE_LINK /> VLINK="<VAR NAME=STYLE_LINK /> VLINK="<VAR NAME=STYLE_LINK />">
  <P>
  <FONT FACE="<VAR NAME=STYLE_FONTFACE />" SIZE="<VAR NAME=STYLE_FONTSIZE />" COLOR="<VAR NAME=STYLE_FONTCOLOR />">
  <VAR NAME=WELCOME_MSG />
  </FONT>
  </P>
</BODY>
</HTML>

All you need to di is edit the the default paths in tmpl.class.php and the re's to match your tag format, and integrate the functions used in test-tmpl.php to replace your tags.