同一字符串的长度不同

Question

I am getting two different count values for same string

 $val1 = $data->sheets[0]['cells'][5][1];//thise value is from excel sheet 
 $val2 = $obj->number; // this is the value from database

 var_dump(trim($val1)) , var_dump(trim($val2))

string(19) "US5922335A" ,  string(10) "US5922335A" 

first values is getting from excel sheet(xls)and The second value is am getting from Mysql table after performing Select query , i am unable to perform comparision like as both are having different length .

if($val1==$va2)
{
    echo "Found it ";   
}

How can i make it to have a same length so that i can compare it.

Answer 1

Not a direct answer to your question but let's first find out what's really behind that string(19) "US5922335A" . Please try

foreach(array($val1,$val2) as $v ) {
    for($i=0; $i<strlen($v); $i++) {
        printf('%02x ', ord($v[$i]));
    }
    echo "<br />\n";
}

if($val1==$val2) {
    echo "Found it ";   
}

and add the output which should be something like

55 53 35 39 32 32 33 33 35 41 <br />
55 53 35 39 32 32 33 33 35 41 <br />

to your question.

---

edit: Your data seems to be little endian UCS-2/UTF-16 encoded.

i am getting as

 string(22) "EP2153814A1" string(10) "US5922335A" \n45 00 50 00 32 00 31 00 35 00 33 00 38 00 31 00 34 00 41 00 31 00 \n55 53 35 39 32 32 33 33 35 41  

Since your data source for that string value is an Excel sheet the easiest solution is probably to use mb_convert_encoding() to change the encoding.

$val1 = $data->sheets[0]['cells'][5][1];
$val1 = mb_convert_encoding($val1, 'ISO-8859-1', 'UTF-16LE');

Answer 2

I will bet that the Mysql table defines the column as a char and not a varchar . If so, it means that the first value has trailing spaces.

You need to remove trailing spaces before doing the equality check.

if(trim($val1)==$va2)
{
    echo "Found it ";   
}