PHP 拼接字符串， 哪个更好？

PHP 拼接字符串，哪个更好呢？

// 1
$rule = [
    'pid=etfscreener&formsubmit=1&etfpage=1&cn=cnUS&cf=&go=&ta=&er=er1&ry=&r1=&r3=&r5=&tac=1&erc=1&ryc=1&r5c=1',
    'pid=etfscreener&formsubmit=1&etfpage=1&cn=cnUS&cf=&go=&ta=&er=er2&ry=&r1=&r3=&r5=&tac=1&erc=1&ryc=1&r5c=1',
    'pid=etfscreener&formsubmit=1&etfpage=1&cn=cnUS&cf=&go=&ta=&er=er3&ry=&r1=&r3=&r5=&tac=1&erc=1&ryc=1&r5c=1',
    'pid=etfscreener&formsubmit=1&etfpage=1&cn=cnUS&cf=&go=&ta=&er=er4&ry=&r1=&r3=&r5=&tac=1&erc=1&ryc=1&r5c=1',
    'pid=etfscreener&formsubmit=1&etfpage=1&cn=cnUS&cf=&go=&ta=&er=er5&ry=&r1=&r3=&r5=&tac=1&erc=1&ryc=1&r5c=1',
];

// 2
$rule = array_map(function($s) {
    return "pid=etfscreener&formsubmit=1&etfpage=1&cn=cnUS&cf=&go=&ta=&er=er{$s}&ry=&r1=&r3=&r5=&tac=1&erc=1&ryc=1&r5c=1";
}, range(1, 5));

// 3
$rule = [];

for ($i = 1; $i < 6; $i++) { 
    $rule[] = "pid=etfscreener&formsubmit=1&etfpage=1&cn=cnUS&cf=&go=&ta=&er=er{$i}&ry=&r1=&r3=&r5=&tac=1&erc=1&ryc=1&r5c=1";
}