我在下面有数组（特别是tx数组），只想要数组中的最后一个（在本例中为32）。
如何做到这一点？ 另外，是否可以在数组中添加 #s？
例如：1+2+3...+31+32？
感谢任何提供帮助的人。
Array
(
[hash] => f52ba5e38ad3a86f54d901fafdb149cbcc190da45783fcdf3099ca272c452289
[confirmations] => 1
[size] => 10111
[height] => 457209
[version] => 2
[merkleroot] => 760639a16ade9568c84c3b6ef830b88bc744cb0dc7a35875553852d478f0a4df
[tx] => Array
(
[0] => 4340529c70443dbc9c476b65201307a232ea9aca80d9bcb231d5d302acc2997a
[1] => cde0d2a5311a981e82dbd8b856a64659f953fbb050246f21beb90cc6595f1ff4
[2] => 8c01dc9ac687a8ca6e51faf1f882c1ec523046d74a9587500751508b5a6be83d
[3] => d9777b6ace68484dc723a7e892da6ead5b32d4f1d9ef236a27f76d77500de144
[4] => 9c4895e4921600d1fbf998115b352254cea94efa9791d3c32be139a6bc2d733a
[5] => f47314ae4cd118c2b824562f29874209f9cfbd47735bf10f92adfe6cd6a273f8
[6] => 53b6c6efcdfb0ed13a39d6602f9a1e1e577fbfb30067b839aa779492b8ec16bc
[7] => f52877a1929ba516261b0cb21603fa30e815ad0b1122f9ec07ce25d9a1c84b0a
[8] => 615851304a629f490e8fca80be73e6e4eb42e31080fb0827b7387ea97a7d57a8
[9] => 1df62c690f898cb2328f9a6de25b74f62c8c03ef401ff5e45a7837360302873a
[10] => e0c787691988d4424e5ae5f9a185a9fbd810b27fd32428041f69f2012155ebe5
[11] => b20568aeaaffa1beec8b1bc0d4acbbf36a06f1d01093af98e539fcf7a42a67cc
[12] => 84504f0f3cb0b01b33388639a29b113e8bee467823062f916910d0f6675a2ff3
[13] => 8af937c341c652a6c9d4cd7e99cf5bb0ac80d0259f02831dc761f5c6f04c0176
[14] => 3e4e1195900cd9dc238b31784cb366cfb3a9c24e52dfda4eadbc0483f73a5430
[15] => 1301c674da30547039da4a5cb252576d421d4546acadbcbe08e4cbe72ef9fb41
[16] => b0564d650cc2c041204122396ffd3fc69b6ea4d7338a9a68f3bf7d8ca8dab319
[17] => 7861d486982df4ecfd72916663fde4facabfbfbe8606e2f92924233090d5fe51
[18] => 6e447ebcd20e4dc0e939a33612dc08f5f17bbccdfaa8eaddb52e81e2a7a19af8
[19] => 7a473f7c7829b3fc0423ed1f3be2dd5f3bc875adce440badd9191206a3135c4e
[20] => d15c965a52c038b5df3295719072a7ff1820f62f569ca7b393f9537ea98c34af
[21] => a954bb3ee5923592f150640e4b0aa9c8e75f218412c0856ede4df8885156c41f
[22] => d6e90a235a5293a7d1655ca2a26871b8e1ff19ffa3d48bd8ebac785b55faa996
[23] => 5f2c7854b13aa129d147fa095f8b5df4b68000322d37531703a40c1fbd42e467
[24] => 00299a2efa03dee409650d267f873167afd84b52978d34d256cd3d91efdbecc7
[25] => 1e136bf8ed16cbeca589e265d86db4ca2abc17207ebe871ef63042c8054a912e
[26] => 8419ed271faa0fd56d8d37fdd4ba97b2b694a5faaaf6027a5f054f1954bad5ec
[27] => d7c0246d271a877453f88e0ff5146110d9dc6e650e647d969e9cca7cfe330e7e
[28] => 591ea2baa8441a0fff5cd86e19730c828fcb259c22379c10e5841e17308f41ec
[29] => 7a6f9baa6d5a312ec0aeca576948787ec2cf214f6587e970a05f9d410144179f
[30] => 1c45cde908c7cb6479cab71709f7022540386b5b32765b149cae892d8dc0430f
[31] => 612e16a6d56aba216c582b71f4942b9f8c5aa3b58fc9f9ce06c8a59006b52bb8
[32] => 451826b51c3f95a968bde0e79ba526e251c22953dd84b8248cc83c679e360182
)
[time] => 1384044294
[nonce] => 224330496
[bits] => 1b3ade18
[difficulty] => 1113.26182029
[previousblockhash] => 3fec0492c75946e4bcf8b5ddd4cb2ca667c5b892df5bf0df1f68de2d9c7ff366
)
用 PHP 函数结束进行测试
end（） 将数组的内部指针推进到最后一个元素，并且 返回其值。
$fruits = array('apple', 'banana', 'cranberry');
echo end($fruits); // cranberry
更新日期
$data = array('hash' => 'f52ba5e38ad3a86f54d901fafdb149cbcc190da45783fcdf3099ca272c452289',
'confirmations' => 1,
'size' => 10111,
'height' => '457209',
'version' => 2,
'merkleroot' => '760639a16ade9568c84c3b6ef830b88bc744cb0dc7a35875553852d478f0a4df',
'tx' => array ('4340529c70443dbc9c476b65201307a232ea9aca80d9bcb231d5d302acc2997a','cde0d2a5311a981e82dbd8b856a64659f953fbb050246f21beb90cc6595f1ff4', '8c01dc9ac687a8ca6e51faf1f882c1ec523046d74a9587500751508b5a6be83d')
);
echo key（ array_slice（ $data['tx']， -1， 1， TRUE ） ）;
$array['tx']Use end
假设您拥有的数组是$array。
$tx_array = $array['tx']
最后一个条目是
$last = end($tx_array);
最后一个键
$lastkey = end(array_keys($tx_array));
end($array['tx']);
print key($array['tx']); # 32
甚至更好：
print end(array_keys($array['tx'])); # 32
如果索引是连续的：
print count($array['tx']) - 1; # 32
要设置$array['#s']：
$array['#s'] = array_sum(array_keys($array['tx']));