Restrict Search Domain - php

Question

I have a data set that I'm searching for certain IPA symbols. I'd like to restrict the search domain in accordance with the value of $where shown in the code below, but don't know how. EDIT: Where $where is "onset" "nucleui" and "coda." Does anyone know how to restrict the search domain? (The code below is in php but the file is linked to an HTML file that a person could use to search for the IPA symbols in the data set.) EDIT: See added code at bottom.
//set up variables
$words = $table[0]; //row 1 of table
$target = $table[1]; //row 2
$indices = array(); //used to store column numbers
$IPAstr = $_POST["ipa"];
$where = $_POST["where"];
//Find $IPAstr in $target
for($i=1; $i<count($target); $i++)
{
if (mb_strpos($target[$i],$IPAstr) !== false)
$indices[] = $i;
}
//List realizations & count frequency
for($i=0; $i<count($indices); $i++)
{
$index = $indices[$i];
$ipalist = array();
echo "<table border=1><tr><td>".$target[$index]." in " . $words[$index]."</td></tr><td>";
//output each speaker and count frequency
for ($j=2; $j<count($table); $j++) {
echo ($j-1).": ".$table[$j][$index]."<br>";
$ipalist[$table[$j][$index]]++;
}
echo "<br>";
//output frequency list
foreach($ipalist as $ipa=>$fre)
echo "$ipa: $fre<br>";
echo "</td></tr></table>";
}
//Code to help search for "onset" "nuclei" and "coda"
//list onsets only
echo "Onsets only<br>";
for($col=0; $col<count($table[0]); $col++) {
$s = $table[0][$col];
if (whichSyllPart($s) == 'o') echo "$s ";
}
//list nuclei only
echo "Nuclei only<br>";
for($col=0; $col<count($table[0]); $col++) {
$s = $table[0][$col];
if (whichSyllPart($s) == 'n') echo "$s ";
}
//list codas only
echo "Codas only<br>";
for($col=0; $col<count($table[0]); $col++) {
$s = $table[0][$col];
if (whichSyllPart($s) == 'c') echo "$s ";
}

Answer 1

In order to restrict the search domain you need to enter the following code as part of the "//Find $IPAstr in $target" section of the code.
//Find $IPAstr in $target
for($i=1; $i<count($target); $i++)
{
if ($where == whichSyllPart($words[$i])){
if (mb_strpos($target[$i],$IPAstr) !== false)
$indices[] = $i;
}
else if ($where == "everywhere"){
if (mb_strpos($target[$i],$IPAstr) !== false)
$indices[] = $i;
}
}
For this to run you need a function whichSyllPart()
function whichSyllPart($sy)
{
$pt = $sy[strlen($sy)-1];
return($pt);
}
This adds an if/else if statement including the whichSyllPart() function that restricts the search according to the value of $where.