首頁猿問求段php 替換輸出的代碼

求段php 替換輸出的代碼

JavaScript

寶慕林4294392 2019-04-16 17:05:49

循環(huán)那部分一直寫不對(duì)要求如下讀取a.txt內(nèi)容是111,2222333,4444555,7777這樣的格式如果$goods_id的值等于其中一行前面的值那么轉(zhuǎn)換成后面的輸出，比如$goods_id=111,那么進(jìn)行替換后輸出$goods_id=2222

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2 回答

慕標(biāo)琳琳

TA貢獻(xiàn)1830條經(jīng)驗(yàn) 獲得超9個(gè)贊

$goods_id=111;$handle=fopen("f:/test.txt","r");while(!feof($handle)){$line=fgets($handle,4096);//echo$line."
";$str=explode(",",$line);if($str[0]==$goods_id){echo$str[1];}}fclose($handle);

反對(duì) 回復(fù) 2019-04-16

HUX布斯

TA貢獻(xiàn)1876條經(jīng)驗(yàn) 獲得超6個(gè)贊

`functiongetGoodsIpMap(){$fh=fopen('a.txt','r');$goodsMap=array();while($line=fgets($fh)!==false){if(empty($line)){continue;}list($oldId,$newId)=explode(',',trim($line));$goodsMap[$oldId]=$newId;}fclose($fh);}$goodsIdMap=getGoodsIpMap();$newId=isset($goodsIdMap[$goodsId])?$goodsIdMap[$goodsId]:$goodsId;`