Array question ..

[doctor_james]

Hi guys .

 

suppose we have an array like this :

$MyArray=array("a1"=>5,"a2"=>6,"a3"=>7,"a4"=>8,"a5"=>9);

how can I generate a1,a2,a3... keys in a "For" loop instead of printing all the elements seprately , I'm looking for some method like this ( I know about "foreach" but I wanna use this method for some  reasons ) :

 

for ($i=0;$i<5;$i++)
{
        echo $MyArray[...];  // How can I get the key (...) ?
}

 

instead of :

 

echo $MyArray['a1'];
echo $MyArray['a12];
echo $MyArray['a3'];
.
.
.

 

thanks in advance.

[hemlata]

Hello doctor_james,

 

Use foreach loop to get the array keys.

$MyArray=array("a1"=>5,"a2"=>6,"a3"=>7,"a4"=>8,"a5"=>9);
foreach($MyArray as $key => $value)
{
   // $key will be a1, a2,... and corresponing values will be 5,6,.... 
}

 

Hope this helps you.

Regards

[doctor_james]

thanks man . as I said I know about foreach loop but I wanna generate the keys in a for loop . for some reason I can't use foreach.

[wildteen88]

You cannot catch the key from an array in a for loop, unless you know what the keys are in the array. If the keys are defined as a1, a2 ... a12 etc. Then you could do:

$MyArray = array("a1"=>5,"a2"=>6,"a3"=>7,"a4"=>8,"a5"=>9);

for ($i = 1; $i < count($MyArray); $i++)
{
    $key = 'a' . $i;

    echo $key . ' = ' . $MyArray[$key] . '<br />';
}

 

However foreach would be better as its sole purpose is to loop through arrays.

$MyArray=array("a1"=>5,"a2"=>6,"a3"=>7,"a4"=>8,"a5"=>9);
foreach($MyArray as $key => $value)
{
   echo $key . ' = ' . $value . '<br />';
}

[hemlata]

Hello,

 

You cannot catch the key from an array in a for loop,

 

You can get the array keys in forloop using following code

 

// loop for array count
for ($i=0; $i<count($MyArray); $i++)
{
// get the current key and associated value for test array
list($var, $val) = each($MyArray);
// diplay key-value for array
echo 'Key :: ' . $var . ' value:: ' . $val .'<br>';
}

 

Hope this could solve your problem.

 

Regards,