- trim: documentation ( source)
- preg_replace: documentation ( source)
<?php
function dgs_clean( $str ) {
return trim(preg_replace('/\s\s+/', ' ', $str));
}
function dgs_strlist($array, $keys) {
$out = ''; $_k = (is_array($keys))?$keys:array($keys);
foreach ($_k as $k => $v) {
$key = (is_int($k))?$v:$k;
if (isset($array[$key]) && !empty($array[$key])) $out .= ' '.(is_int($k))?$array[$key]:$v;
}
return dgs_clean($out);
}
$test = array('name' => 'myInput', 'value' => '123', 'type' => 'text', '_prepend' => '@', 'class' => 'component inline');
echo dgs_strlist($test, array('class', '_prepend' => 'input-prepend'));