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<?php
namespace Ajax\service;
class JString {
public static function contains($hay,$needle){
return strpos($hay, $needle) !== false;
}
public static function startswith($hay, $needle) {
return substr($hay, 0, strlen($needle)) === $needle;
public static function endswith($hay, $needle) {
return substr($hay, -strlen($needle)) === $needle;
public static function isNull($s){
return (!isset($s) || NULL===$s || ""===$s);
public static function isNotNull($s){
return (isset($s) && NULL!==$s && ""!==$s);
public static function isBoolean($value){
return \is_bool($value) || $value==1 || $value==0;
public static function isBooleanTrue($value){
return $value==1 || $value;
public static function isBooleanFalse($value){
return $value==0 || !$value;
public static function camelCaseToSeparated($input,$separator=" "){
return strtolower(preg_replace('/(?<!^)[A-Z]/', $separator.'$0', $input));
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