multidimensional array search PHP reading from file - php

Question

Hi In another post I learned how to read data from a text file into an array. After the script reads the text file here is the resulting array of data.
What I'm trying to do is simply return the 'key' or record number where a search string appears i.e. if I pass the parameter 'muscle3' it should return '3' because it is the third 'row' in the table
Then I can easily extract the other columns with $arrayTable[$keyVal][2] and $arrayTable[$keyVal][3]
As you can see the pageName which is the search field is stored in $arrayTable[$keyVal][2]
By getting the $keyValue from a search, i can then get the other pages.
i.e. mygreatwebsite.com/?page=muscle3
it then fetches the data from the array and it
But when I run the script below it gives the following error message
"Warning: Invalid argument supplied for foreach()"
$page=$_REQUEST['page'];
$keyVal = searchForId($page,$arrayTable); // this is the value I want returned
function searchForId($id, $array) {
foreach ($array as $key => $val) {
print_r ($val); print "<br><br>";
if ($val === $id) {
return $key;
}
}
return null;
here is the output from the above script
Array ( [0] => muscle1 [1] => arrayField [2] => description )
Array ( [0] => muscle2 [1] => arrayField2 [2] => description )
Array ( [0] => muscle3 [1] => arrayField3 [2] => description )
Can someone help me figure this one out? Thanks!
Someone asked how the array table is being defined: here it is
$i=0;
if (($handle = fopen($inputFile, "r")) !== FALSE) {
while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
$arrayTable[$i] = $data; $i++;
}
fclose($handle);
}
input file is a CSV file with the first row containing column headings and each subsequent row containing data
the first column is called 'pageName'
What I'm seeking to do is 'search' for the 'pageName' and just return which record.
i.e. Muscle 1 is in record #1 muscle3 is is record #3
its a simple example - the CSV file is much more complex that this.