PHP Replace chars by functions - php

Question

I try change characters by functions
<?php
$string = "Hi everybody people [gal~images/articles~100~100~4] here other imagen [gal~images/products~100~100~3]";
$regex = "/\[(.*?)\]/";
preg_match_all($regex, $string, $matches);
for($i=0; $i<count($matches[1]);$i++)
{
$match = $matches[1][$i];
$array = explode('~', $match);
//$newValuet="gal("".$array[1]."","".$array[2]."","".$array[3]."","".$array[4]."")";
$newValue="gal(".$array[1].",".$array[2].",".$array[3].",".$array[4].")";
$string = str_replace($matches[0][$i],$newValue,$string);
}
echo $string;
?>
The problem here :
$newValue="gal(".$array[1].",".$array[2].",".$array[3].",".$array[4].")";
$string = str_replace($matches[0][$i],$newValue,$string);
Function no give the right results i try differents methods but continue the problems , please i see all functions but no get this works if you can answer please put me some modification of this code for i can understand , thank´s a lot for all help
MORE INFORMATION
The script generate new values this values must send thhe function of gall for insert and show replace tags and put all well , show text and tags replace
$newValue="gal(".$array[1].",".$array[2].",".$array[3].",".$array[4].")";
$string = str_replace($matches[0][$i],$newValue,$string);
Here the function show the gal , the function execute when must execute into str_replace for put the text , before replace the tags and continue , only this fail
P.D : I pay respect some people , i go here for send my questions howewer in many cases writte bad but english no native for me , and sure for all people here in many cases luke the people respect if no speak well , all people here need learn or need help and howewer tomorrow i can help other people or this people me , nothing more pay , thank´s
Regards

Answer 1

Function of gallery
<?php
function gal($dire,$w_size,$h_size,$cols)
{
$n_images=0;
$dir=opendir("$dire");
while($file=readdir($dir))
{
if ($file!="." && $file!=".." && $file!="Thumbs.db" && $file!="index.html" && $file!=".htaccess" && $file!="config.dat")
{
$n_images++;
$imagenes[]=$file;
}
}
closedir($dir);
$num_img="".$n_images."";
$num_img_cols="".$cols."";
$num_filas="".ceil($num_img/$num_img_cols)."";
echo '<table width="10%" border="0" cellpadding="3" cellspacing="2" align="center">
<tr>
<td colspan="'.$num_img_cols.'"> </td>
</tr><tr>';
$x=1;
for ($j=0;$j<$n_images;$j++)
{
print "<td align='center'>";
//echo '<img src="'.$dire.'/'.$imagenes[$j].'" width="'.$w_size.'" height="'.$h_size.'">';
print "<a href='".$dire."/".$imagenes[$j]."' class='highslide' onclick=\"return hs.expand(this,{slideshowGroup:'group1',align:'center'})\">";
print '<img src="indexer_resizer.php?ruta_f='.$dire.'/&image='.$imagenes[$j].'&new_width='.$w_size.'&new_height='.$h_size.'" border="0" alt="Pulse para Ampliar" title="Pulse para Ampliar">
</a>';
if ($x%$num_img_cols==0)
{
print "</tr>";
}
$x++;
}
echo "</table>";
}
?>
**Function for replace tags**
<?php
$string = "Hola todos os presento una nueva galeria [galt~imagenes/articulos~100~100~4] Aqui otra más [gal~imagenes/productos~100~100~3]";
$regex = "/\[(.*?)\]/";
preg_match_all($regex, $string, $matches);
for($i=0; $i<count($matches[1]);$i++)
{
$match = $matches[1][$i];
$array = explode('~', $match);
//$newValuet="gal("".$array[1]."","".$array[2]."","".$array[3]."","".$array[4]."")";
$newValue="gal(".$array[1].",".$array[2].",".$array[3].",".$array[4].")";
$string = str_replace($matches[0][$i],$newValue,$string);
}
echo $string;
?>
This is all function and you can see here , the script use 2 things the function for see gallery and the script for replace and show gallery , but no works fine
The script generate new values this values must send thhe function of gall for insert and show replace tags and put all well , show text and tags replace
$newValue="gal(".$array[1].",".$array[2].",".$array[3].",".$array[4].")";
$string = str_replace($matches[0][$i],$newValue,$string);
Here the function show the gal , the function execute when must execute into str_replace for put the text , before replace the tags and continue , only this fail
P.D : I pay respect some people , i go here for send my questions howewer in many cases writte bad but english no native for me , and sure for all people here in many cases luke the people respect if no speak well , all people here need learn or need help and howewer tomorrow i can help other people or this people me , nothing more pay , thank´s
Regards

Answer 2

To capture those portions of the string try:
$string = "Hi everybody people [gal~images/articles~100~100~4] here other imagen [gal~images/products~100~100~3]";
preg_match_all('/\[(.+)\]/ismU, $string, $matches);
or
preg_match_all('/\[(\w+)\~([a-z0-9\/]+)\~(\d+)\~(\d+)\~(\d+)\]/ismU, $string, $matches);
The last one results a bit more complicated structure of $matches but prooves that you'll catch exactly the data you need.