我有一个 Json 文件$championsList，它在其索引中跳过一堆数字。例如，$championsList["data"][46]不存在，在底部它从 268 跳到 412。还有一堆更分散的。
我尝试编写一个 for 循环来遍历["data"]索引作为测试。
for($i=1; $i <= sizeof($championsList["data"]; $i++) {
echo $championsList["data"][$i]["key"];
}
这样做的问题是，["data"]索引的大小是 136，所以当它到达循环末尾时，它会执行echo $championsList["data"][136]["key"];并停止，跳过数字大于 136 的所有内容，因为它还会遍历不存在的索引，例如echo $championsList["data"][$46]["key"];
我知道我能做到
for($i=1; $i <= 498; $i++) {
echo ...
}
但这似乎效率很低，当新角色添加到游戏中时，我必须不断调整它
我怎样才能让它迭代并跳过所有丢失的数字？
Json 文件：
{
"type": "champion",
"version": "7.10.1",
"data": {
"1": {
"id": 1,
"key": "Annie",
"name": "Annie",
"title": "the Dark Child"
},
"2": {
"id": 2,
"key": "Olaf",
"name": "Olaf",
"title": "the Berserker"
},
"3": {
"id": 3,
"key": "Galio",
"name": "Galio",
"title": "the Colossus"
},
"4": {
"id": 4,
"key": "TwistedFate",
"name": "Twisted Fate",
"title": "the Card Master"
},
"5": {
"id": 5,
"key": "XinZhao",
"name": "Xin Zhao",
"title": "the Seneschal of Demacia"
},
"6": {
"id": 6,
"key": "Urgot",
"name": "Urgot",
"title": "the Headsman's Pride"
},
"7": {
"id": 7,
"key": "Leblanc",
"name": "LeBlanc",
"title": "the Deceiver"
},
"8": {
"id": 8,
"key": "Vladimir",
"name": "Vladimir",
"title": "the Crimson Reaper"
},
"9": {
"id": 9,
"key": "Fiddlesticks",
"name": "Fiddlesticks",
"title": "the Harbinger of Doom"
},
"10": {
"id": 10,
"key": "Kayle",
"name": "Kayle",
"title": "The Judicator"
},
"11": {
"id": 11,
"key": "MasterYi",
"name": "Master Yi",
"title": "the Wuju Bladesman"
},
"12": {
"id": 12,
"key": "Alistar",
"name": "Alistar",
"title": "the Minotaur"
},
"13": {
"id": 13,
"key": "Ryze",
"name": "Ryze",
"title": "the Rune Mage"
},
"14": {
"id": 14,
"key": "Sion",
"name": "Sion",
"title": "The Undead Juggernaut"
},
"15": {
"id": 15,
"key": "Sivir",
"name": "Sivir",
"title": "the Battle Mistress"
},
"16": {
"id": 16,
"key": "Soraka",
"name": "Soraka",
"title": "the Starchild"
},
"17": {
"id": 17,
"key": "Teemo",
"name": "Teemo",
"title": "the Swift Scout"
},
"18": {
"id": 18,
"key": "Tristana",
"name": "Tristana",
"title": "the Yordle Gunner"
},
"19": {
"id": 19,
"key": "Warwick",
"name": "Warwick",
"title": "the Uncaged Wrath of Zaun"
},
"20": {
"id": 20,
"key": "Nunu",
"name": "Nunu",
"title": "the Yeti Rider"
},
"21": {
"id": 21,
"key": "MissFortune",
"name": "Miss Fortune",
"title": "the Bounty Hunter"
},
"22": {
"id": 22,
"key": "Ashe",
"name": "Ashe",
"title": "the Frost Archer"
},
"23": {
"id": 23,
"key": "Tryndamere",
"name": "Tryndamere",
"title": "the Barbarian King"
},
"24": {
"id": 24,
"key": "Jax",
"name": "Jax",
"title": "Grandmaster at Arms"
},
"25": {
"id": 25,
"key": "Morgana",
"name": "Morgana",
"title": "Fallen Angel"
},
"26": {
"id": 26,
"key": "Zilean",
"name": "Zilean",
"title": "the Chronokeeper"
},
"27": {
"id": 27,
"key": "Singed",
"name": "Singed",
"title": "the Mad Chemist"
},
"28": {
"id": 28,
"key": "Evelynn",
"name": "Evelynn",
"title": "the Widowmaker"
},
"29": {
"id": 29,
"key": "Twitch",
"name": "Twitch",
"title": "the Plague Rat"
},
"30": {
"id": 30,
"key": "Karthus",
"name": "Karthus",
"title": "the Deathsinger"
},
"31": {
"id": 31,
"key": "Chogath",
"name": "Cho'Gath",
"title": "the Terror of the Void"
},
"32": {
"id": 32,
"key": "Amumu",
"name": "Amumu",
"title": "the Sad Mummy"
},
"33": {
"id": 33,
"key": "Rammus",
"name": "Rammus",
"title": "the Armordillo"
},
"34": {
"id": 34,
"key": "Anivia",
"name": "Anivia",
"title": "the Cryophoenix"
},
"35": {
"id": 35,
"key": "Shaco",
"name": "Shaco",
"title": "the Demon Jester"
},
"36": {
"id": 36,
"key": "DrMundo",
"name": "Dr. Mundo",
"title": "the Madman of Zaun"
},
"37": {
"id": 37,
"key": "Sona",
"name": "Sona",
"title": "Maven of the Strings"
},
"38": {
"id": 38,
"key": "Kassadin",
"name": "Kassadin",
"title": "the Void Walker"
},
"39": {
"id": 39,
"key": "Irelia",
"name": "Irelia",
"title": "the Will of the Blades"
},
"40": {
"id": 40,
"key": "Janna",
"name": "Janna",
"title": "the Storm's Fury"
},
"41": {
"id": 41,
"key": "Gangplank",
"name": "Gangplank",
"title": "the Saltwater Scourge"
},
"42": {
"id": 42,
"key": "Corki",
"name": "Corki",
"title": "the Daring Bombardier"
},
"43": {
"id": 43,
"key": "Karma",
"name": "Karma",
"title": "the Enlightened One"
},
"44": {
"id": 44,
"key": "Taric",
"name": "Taric",
"title": "the Shield of Valoran"
},
"45": {
"id": 45,
"key": "Veigar",
"name": "Veigar",
"title": "the Tiny Master of Evil"
},
"48": {
"id": 48,
"key": "Trundle",
"name": "Trundle",
"title": "the Troll King"
},
"50": {
"id": 50,
"key": "Swain",
"name": "Swain",
"title": "the Master Tactician"
},
"51": {
"id": 51,
"key": "Caitlyn",
"name": "Caitlyn",
"title": "the Sheriff of Piltover"
},
"53": {
"id": 53,
"key": "Blitzcrank",
"name": "Blitzcrank",
"title": "the Great Steam Golem"
},
"54": {
"id": 54,
"key": "Malphite",
"name": "Malphite",
"title": "Shard of the Monolith"
},
"55": {
"id": 55,
"key": "Katarina",
"name": "Katarina",
"title": "the Sinister Blade"
},
"56": {
"id": 56,
"key": "Nocturne",
"name": "Nocturne",
"title": "the Eternal Nightmare"
},
"57": {
"id": 57,
"key": "Maokai",
"name": "Maokai",
"title": "the Twisted Treant"
},
"58": {
"id": 58,
"key": "Renekton",
"name": "Renekton",
"title": "the Butcher of the Sands"
},
"59": {
"id": 59,
"key": "JarvanIV",
"name": "Jarvan IV",
"title": "the Exemplar of Demacia"
},
"60": {
"id": 60,
"key": "Elise",
"name": "Elise",
"title": "the Spider Queen"
},
"61": {
"id": 61,
"key": "Orianna",
"name": "Orianna",
"title": "the Lady of Clockwork"
},
"62": {
"id": 62,
"key": "MonkeyKing",
"name": "Wukong",
"title": "the Monkey King"
},
"63": {
"id": 63,
"key": "Brand",
"name": "Brand",
"title": "the Burning Vengeance"
},
"64": {
"id": 64,
"key": "LeeSin",
"name": "Lee Sin",
"title": "the Blind Monk"
},
"67": {
"id": 67,
"key": "Vayne",
"name": "Vayne",
"title": "the Night Hunter"
},
"68": {
"id": 68,
"key": "Rumble",
"name": "Rumble",
"title": "the Mechanized Menace"
},
"69": {
"id": 69,
"key": "Cassiopeia",
"name": "Cassiopeia",
"title": "the Serpent's Embrace"
},
"72": {
"id": 72,
"key": "Skarner",
"name": "Skarner",
"title": "the Crystal Vanguard"
},
"74": {
"id": 74,
"key": "Heimerdinger",
"name": "Heimerdinger",
"title": "the Revered Inventor"
},
"75": {
"id": 75,
"key": "Nasus",
"name": "Nasus",
"title": "the Curator of the Sands"
},
"76": {
"id": 76,
"key": "Nidalee",
"name": "Nidalee",
"title": "the Bestial Huntress"
},
"77": {
"id": 77,
"key": "Udyr",
"name": "Udyr",
"title": "the Spirit Walker"
},
"78": {
"id": 78,
"key": "Poppy",
"name": "Poppy",
"title": "Keeper of the Hammer"
},
"79": {
"id": 79,
"key": "Gragas",
"name": "Gragas",
"title": "the Rabble Rouser"
},
"80": {
"id": 80,
"key": "Pantheon",
"name": "Pantheon",
"title": "the Artisan of War"
},
"81": {
"id": 81,
"key": "Ezreal",
"name": "Ezreal",
"title": "the Prodigal Explorer"
},
"82": {
"id": 82,
"key": "Mordekaiser",
"name": "Mordekaiser",
"title": "the Iron Revenant"
},
"83": {
"id": 83,
"key": "Yorick",
"name": "Yorick",
"title": "Shepherd of Souls"
},
"84": {
"id": 84,
"key": "Akali",
"name": "Akali",
"title": "the Fist of Shadow"
},
"85": {
"id": 85,
"key": "Kennen",
"name": "Kennen",
"title": "the Heart of the Tempest"
},
"86": {
"id": 86,
"key": "Garen",
"name": "Garen",
"title": "The Might of Demacia"
},
"89": {
"id": 89,
"key": "Leona",
"name": "Leona",
"title": "the Radiant Dawn"
},
"90": {
"id": 90,
"key": "Malzahar",
"name": "Malzahar",
"title": "the Prophet of the Void"
},
"91": {
"id": 91,
"key": "Talon",
"name": "Talon",
"title": "the Blade's Shadow"
},
"92": {
"id": 92,
"key": "Riven",
"name": "Riven",
"title": "the Exile"
},
"96": {
"id": 96,
"key": "KogMaw",
"name": "Kog'Maw",
"title": "the Mouth of the Abyss"
},
"98": {
"id": 98,
"key": "Shen",
"name": "Shen",
"title": "the Eye of Twilight"
},
"99": {
"id": 99,
"key": "Lux",
"name": "Lux",
"title": "the Lady of Luminosity"
},
"101": {
"id": 101,
"key": "Xerath",
"name": "Xerath",
"title": "the Magus Ascendant"
},
"102": {
"id": 102,
"key": "Shyvana",
"name": "Shyvana",
"title": "the Half-Dragon"
},
"103": {
"id": 103,
"key": "Ahri",
"name": "Ahri",
"title": "the Nine-Tailed Fox"
},
"104": {
"id": 104,
"key": "Graves",
"name": "Graves",
"title": "the Outlaw"
},
"105": {
"id": 105,
"key": "Fizz",
"name": "Fizz",
"title": "the Tidal Trickster"
},
"106": {
"id": 106,
"key": "Volibear",
"name": "Volibear",
"title": "the Thunder's Roar"
},
"107": {
"id": 107,
"key": "Rengar",
"name": "Rengar",
"title": "the Pridestalker"
},
"110": {
"id": 110,
"key": "Varus",
"name": "Varus",
"title": "the Arrow of Retribution"
},
"111": {
"id": 111,
"key": "Nautilus",
"name": "Nautilus",
"title": "the Titan of the Depths"
},
"112": {
"id": 112,
"key": "Viktor",
"name": "Viktor",
"title": "the Machine Herald"
},
"113": {
"id": 113,
"key": "Sejuani",
"name": "Sejuani",
"title": "Fury of the North"
},
"114": {
"id": 114,
"key": "Fiora",
"name": "Fiora",
"title": "the Grand Duelist"
},
"115": {
"id": 115,
"key": "Ziggs",
"name": "Ziggs",
"title": "the Hexplosives Expert"
},
"117": {
"id": 117,
"key": "Lulu",
"name": "Lulu",
"title": "the Fae Sorceress"
},
"119": {
"id": 119,
"key": "Draven",
"name": "Draven",
"title": "the Glorious Executioner"
},
"120": {
"id": 120,
"key": "Hecarim",
"name": "Hecarim",
"title": "the Shadow of War"
},
"121": {
"id": 121,
"key": "Khazix",
"name": "Kha'Zix",
"title": "the Voidreaver"
},
"122": {
"id": 122,
"key": "Darius",
"name": "Darius",
"title": "the Hand of Noxus"
},
"126": {
"id": 126,
"key": "Jayce",
"name": "Jayce",
"title": "the Defender of Tomorrow"
},
"127": {
"id": 127,
"key": "Lissandra",
"name": "Lissandra",
"title": "the Ice Witch"
},
"131": {
"id": 131,
"key": "Diana",
"name": "Diana",
"title": "Scorn of the Moon"
},
"133": {
"id": 133,
"key": "Quinn",
"name": "Quinn",
"title": "Demacia's Wings"
},
"134": {
"id": 134,
"key": "Syndra",
"name": "Syndra",
"title": "the Dark Sovereign"
},
"136": {
"id": 136,
"key": "AurelionSol",
"name": "Aurelion Sol",
"title": "The Star Forger"
},
"143": {
"id": 143,
"key": "Zyra",
"name": "Zyra",
"title": "Rise of the Thorns"
},
"150": {
"id": 150,
"key": "Gnar",
"name": "Gnar",
"title": "the Missing Link"
},
"154": {
"id": 154,
"key": "Zac",
"name": "Zac",
"title": "the Secret Weapon"
},
"157": {
"id": 157,
"key": "Yasuo",
"name": "Yasuo",
"title": "the Unforgiven"
},
"161": {
"id": 161,
"key": "Velkoz",
"name": "Vel'Koz",
"title": "the Eye of the Void"
},
"163": {
"id": 163,
"key": "Taliyah",
"name": "Taliyah",
"title": "the Stoneweaver"
},
"164": {
"id": 164,
"key": "Camille",
"name": "Camille",
"title": "the Steel Shadow"
},
"201": {
"id": 201,
"key": "Braum",
"name": "Braum",
"title": "the Heart of the Freljord"
},
"202": {
"id": 202,
"key": "Jhin",
"name": "Jhin",
"title": "the Virtuoso"
},
"203": {
"id": 203,
"key": "Kindred",
"name": "Kindred",
"title": "The Eternal Hunters"
},
"222": {
"id": 222,
"key": "Jinx",
"name": "Jinx",
"title": "the Loose Cannon"
},
"223": {
"id": 223,
"key": "TahmKench",
"name": "Tahm Kench",
"title": "the River King"
},
"236": {
"id": 236,
"key": "Lucian",
"name": "Lucian",
"title": "the Purifier"
},
"238": {
"id": 238,
"key": "Zed",
"name": "Zed",
"title": "the Master of Shadows"
},
"240": {
"id": 240,
"key": "Kled",
"name": "Kled",
"title": "the Cantankerous Cavalier"
},
"245": {
"id": 245,
"key": "Ekko",
"name": "Ekko",
"title": "the Boy Who Shattered Time"
},
"254": {
"id": 254,
"key": "Vi",
"name": "Vi",
"title": "the Piltover Enforcer"
},
"266": {
"id": 266,
"key": "Aatrox",
"name": "Aatrox",
"title": "the Darkin Blade"
},
"267": {
"id": 267,
"key": "Nami",
"name": "Nami",
"title": "the Tidecaller"
},
"268": {
"id": 268,
"key": "Azir",
"name": "Azir",
"title": "the Emperor of the Sands"
},
"412": {
"id": 412,
"key": "Thresh",
"name": "Thresh",
"title": "the Chain Warden"
},
"420": {
"id": 420,
"key": "Illaoi",
"name": "Illaoi",
"title": "the Kraken Priestess"
},
"421": {
"id": 421,
"key": "RekSai",
"name": "Rek'Sai",
"title": "the Void Burrower"
},
"427": {
"id": 427,
"key": "Ivern",
"name": "Ivern",
"title": "the Green Father"
},
"429": {
"id": 429,
"key": "Kalista",
"name": "Kalista",
"title": "the Spear of Vengeance"
},
"432": {
"id": 432,
"key": "Bard",
"name": "Bard",
"title": "the Wandering Caretaker"
},
"497": {
"id": 497,
"key": "Rakan",
"name": "Rakan",
"title": "The Charmer"
},
"498": {
"id": 498,
"key": "Xayah",
"name": "Xayah",
"title": "the Rebel"
}
}
}
你想要 foreach，它会考虑每个元素而不管它的索引：http : //php.net/manual/en/control-structures.foreach.php
foreach($championsList["data"] as $champion) {
echo $champion["key"];
}
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