CamelCase to Title Case PHP Regex

camel2Title.php

<?php

function camelToTitle($camelStr)
{
    $intermediate = preg_replace('/(?!^)([[:upper:]][[:lower:]]+)/',
                          ' $0',
                          $camelStr);
    $titleStr = preg_replace('/(?!^)([[:lower:]])([[:upper:]])/',
                          '$1 $2',
                          $intermediate);

    return $titleStr;
}

function testCamelToTitle()
{
    $testData = array(
        '',
        'sample',
        'Sample',
        'sampleStr',
        'SampleStr',
        'SomeIDWithNumb3rs',
        'SomeID4Test',
        'ABCPvtLtd',
        'ABC',
    );

    foreach ($testData as $value) {
        echo "'" . $value . "' => '" . camelToTitle($value) . "'\n";
    }
}

testCamelToTitle();
?>

@tahirafridi you are welcome on the fix!