靶向JSON數組的特定部分，如果存在的話創建表

Question

我有一個複雜的JSON數組我想針對特定行/字符串，如果存在，則添加一個小桌子，以網頁...

這是數組

{ 
"coastalWarnings":[{ 
    "loc":"ABEL", 
    "warn":"GALE" 
    },{ 
    "loc":"CASTLEPOINT", 
    "warn":"STORM" 
    },{ 
    "loc":"CHALMERS", 
    "warn":"GALE" 
    },{ 
    "loc":"CHATHAM ISLANDS", 
    "warn":"GALE" 
    },{ 
    "loc":"CONWAY", 
    "warn":"STORM" 
    },{ 
    "loc":"COOK", 
    "warn":"STORM" 
    },{ 
    "loc":"FOVEAUX", 
    "warn":"GALE" 
    },{ 
    "loc":"GREY", 
    "warn":"GALE" 
    },{ 
    "loc":"MILFORD", 
    "warn":"STORM" 
    },{ 
    "loc":"PORTLAND", 
    "warn":"GALE" 
    },{ 
    "loc":"PUYSEGUR", 
    "warn":"STORM" 
    },{ 
    "loc":"RAGLAN", 
    "warn":"GALE" 
    },{ 
    "loc":"RANGITATA", 
    "warn":"GALE" 
    },{ 
    "loc":"STEPHENS", 
    "warn":"GALE" 
    } 
    ], 
"isAdvisory":true, 
"isOutlook":true, 
"isVhf":true, 
"isWatch":true, 
"liftedWarnings":[ 
    ], 
"oceanicWarnings":[{ 
    "loc":"FORTIES", 
    "warn":"GALE" 
    },{ 
    "loc":"PACIFIC", 
    "warn":"GALE" 
    },{ 
    "iceAccretion":true, 
    "loc":"SOUTHERN", 
    "warn":"GALE" 
    },{ 
    "loc":"SUBTROPIC", 
    "warn":"GALE" 
    } 
    ], 
"roadSnowWarnings":[ 
    ], 
"severeWarnings":[{ 
    "loc":"BULLER", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"CANTERBURY", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"FIORDLAND", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"HAWKES BAY", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"MANAWATU", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"MARLBOROUGH", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"NELSON", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"OTAGO", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"SOUTHLAND", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"TAIHAPE", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"TARANAKI", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"TAUMARUNUI", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"TAUPO", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"WAIRARAPA", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"WAITOMO", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"WANGANUI", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"WELLINGTON", 
    "warn":["ISSUE" 
    ] 
    },{ 
    "loc":"WESTLAND", 
    "warn":["ISSUE" 
    ] 
    } 
    ], 
"thunderstormWarnings":[ 
    ] 
} 

正如你可以看到陣列被分成部分 -

"coastalWarnings" 
"liftedWarnings" 
"oceanicWarnings" 
"roadSnowWarnings" 
"severeWarnings" 
"thunderstormWarnings" 

我希望爲目標「severeWarnings」，特別是「祿」：「坎特伯雷」，這顯示秒 -

},{ 
    "loc":"CANTERBURY", 
    "warn":["ISSUE" 
    ] 
    },{ 

所以當存在於數組就會引發表如

<table align="center" width="100%" bgcolor="red"> 
    <tr><td><strong>Severe Weather Warning in effect for CANTERBURY</strong></td></tr> 
</table> 

最大的問題是數組改變了所有的時間，所以需要針對我想通過搜索特定的單詞或措辭除非它可以可靠地分解成部分。

能夠像這項工作一樣簡單？

<? 
$table = <table align="center" width="100%" bgcolor="red"><tr><td><strong>Severe Weather Warning in effect for CANTERBURY</strong></td></tr></table>; 

$file = file_get_contents("filename.ext"); 
if(!strpos($file, ""loc":"CANTERBURY"")) { 
echo $table; 
} 
? 

不確定如何去了解這一點，我的PHP技能相當有限的，所以如果你會這麼好心給我一個腳本或就如何實現這一步一步，我會永遠如此欣賞。

在此先感謝。

Answer 1

亞歷克斯建議，使用json_decode

$s = getData(); // returning the string from the question 
$data = json_decode($s, true); 

foreach($data['severeWarnings'] as $cw) { 
    if ('CANTERBURY'===$cw['loc']) { 
    foreach($cw['warn'] as $msg) { 
     echo "-- ", $msg, " --\n"; 
    } 
    } 
} 

打印-- ISSUE --