function grep($content, $string, $params = '')
{
// params: i, v, w
$content = unix_nl($content);
$lines = explode("\n", $content);
foreach ($lines as $line) {
if (!strstr($params, 'w')) {
if (strstr($params, 'i')) {
if (strstr($params, 'v')) {
if (!stristr($line, $string)) {
$find[] = $line;
}
} else {
if (stristr($line, $string)) {
$find[] = $line;
}
}
} else {
if (strstr($params, 'v')) {
if (!strstr($line, $string)) {
$find[] = $line;
}
} else {
if (strstr($line, $string)) {
$find[] = $line;
}
}
}
} else {
if (strstr($params, 'i')) {
if (strstr($params, 'v')) {
if (!is_word($string, $line, 'i')) {
$find[] = $line;
}
} else {
if (is_word($string, $line, 'i')) {
$find[] = $line;
}
}
} else {
if (strstr($params, 'v')) {
if (!is_word($string, $line)) {
$find[] = $line;
}
} else {
if (is_word($string, $line)) {
$find[] = $line;
}
}
}
}
}
if (is_array($find)) {
$ret_val = implode("\n", $find);
if (substr($ret_val, -1) != "\n") {
$ret_val .= "\n";
}
$find = NULL;
return $ret_val;
} else {
return false;
}
}
/**
* Checks if the word is valid
*
* @param string word to check
* @return string error message if word is not valid
*/
function check_is_word($word)
{
if (!is_word($word)) {
return T_('This field should be a single word; A-Z only.');
}
}