problem with variable in php

[huyhoang08]

i have big problem with variable it seem to not work properly. sad.
please help me.
My code:

for($m=0;$m<count($arrayProd);$m++)
{
    //get image of product
    
    $product_name1=substr(trim($arrayProd[$m]),0,strpos($arrayProd[$m],"(")-1);
        echo $product_name1."<br>";                                                
    while($row2=mysql_fetch_array($rs2))
    {
    
        if(strcmp($row2['fullname'],$product_name1) == 0)
        { echo "sp='".$product_name1."'<br>";
            $stack_products=$stack_products."<td><img src='".$row2['image']."' border='0'/><br><a target='_blank' href='http://sakurakhanh.summerhost.info/downloadpage.php?media=".$row2['name']."'>".$row2['fullname']."</a></td>";
            
        }
    }
} 

==> the line echo "sp='".$product_name1."'<br>"; get value of $product_name1 that empty. why???

[SrWebDeveloper]

Well, you set that variable a few lines earlier via:

$product_name1=substr(trim($arrayProd[$m]),0,strpos($arrayProd[$m],"(")-1); 

You need to debug all the variables involved (echo their values) and see what's going on.

If the results are what you expect, then do the same thing for this line:

if(strcmp($row2['fullname'],$product_name1) == 0) 

See how the variables are set, and confirm your logic for that "if" condition.

-jim

[huyhoang08]

echo $product_name1."<br>"; this line reach the value , but /echo "sp='".$product_name1."'<br>"; / this line in if statement that not

[SrWebDeveloper]

Respectfully, your question was asked and answered, there is no need to repeat yourself.