mcrypt encryption equivalent of openssl_encrypt - php

Question

I need openssl_encrypt equivalent of the below mcrypt encryption.
public function encrypt($str) {
$key = 'zXmW8rXT7id3s06m';
$blocksize = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$pad = $blocksize - (strlen($str) % $blocksize);
$str = $str . str_repeat(chr($pad), $pad);
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
$iv = #mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
mcrypt_generic_init($td, $key, $iv);
$cyper_text = mcrypt_generic($td, $str);
$rt = base64_encode($cyper_text);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
return $rt;
}
I tried like below. But both the outputs are not same.
public function openSslEncrypt($str){
$cipher = "AES-128-CBC";
$key = 'zXmW8rXT7id3s06m';
if (in_array($cipher, openssl_get_cipher_methods()))
{
$ivlen = openssl_cipher_iv_length($cipher);
$iv = openssl_random_pseudo_bytes($ivlen);
$ciphertext_raw = openssl_encrypt($str, $cipher, $key, $options=OPENSSL_RAW_DATA, $iv);
$ciphertext = base64_encode( $ciphertext_raw );
return $ciphertext;
}
}

Answer 1

I am able to find solution for this after some tries. Posting the code below.
public function openSslEncrypt($str){
$cipher = "aes-128-ecb";
$key = 'zXmW8rXT7id3s06m';
if (strlen($str) % 16) {
$pad = 16 - (strlen($str) % 16);
$str = $str . str_repeat(chr($pad), $pad);
}
if (in_array($cipher, openssl_get_cipher_methods()))
{
$ciphertext_raw = openssl_encrypt($str, $cipher, $key, OPENSSL_RAW_DATA);
$ciphertext = base64_encode( $ciphertext_raw );
return $ciphertext;
}
}