XCH(chia) getCoinId by PHP

coinId.php

<?php 
	function hexToStr($hex){
    		$string='';
    		for ($i=0; $i < strlen($hex)-1; $i+=2){
        	$string .= chr(hexdec($hex[$i].$hex[$i+1]));
    		}
    		return $string;
	}
	
	function getCoinId($parent_coin_info,$puzzle_hash,$amount){
    		$coinId='';
		$amountHex=dechex($amount);
		while(strlen($amountHex)%2>0){
			$amountHex='0'.$amountHex;
		}
		if(!is_numeric(substr($amountHex,0,1))){
			$amountHex='00'.$amountHex;
		}
   		$coinId=hash('sha256', hexToStr($parent_coin_info.$puzzle_hash.$amountHex));
    		return $coinId;
	}
	
	$coinid=getCoinId('ccd5bb71183532bff220ba46c268991a00000000000000000000000000000000','d23da14695a188ae5708dd152263c4db883eb27edeb936178d4d988b8f3ce5fc',18375000000000000000);
	echo 'coinId值:'.$coinid;
?>