PHP檔案操作 - 替換某行，插入某行，刪除某行，擷取行號

<?php// fedora-centos-apache-php-cannot-write-delete-file// getsebool -a|grep httpd// httpd_unified --> off// setsebool -P httpd_unified 1replaceTarget("test.txt", "aaaaaaaaaaaaaaaaa", "AAAAA");//unlink("test.txt");#替換指定字串function replaceTarget($filePath, $replaceCont, $target){    $result = null;    $fileCont = file_get_contents($filePath);    $targetIndex = strpos($fileCont, $target); #尋找目標字串的座標    if ($targetIndex !== false) {        #找到target的前一個分行符號        $preChLineIndex = strrpos(substr($fileCont, 0, $targetIndex + 1), "\n");        #找到target的後一個分行符號        $AfterChLineIndex = strpos(substr($fileCont, $targetIndex), "\n") + $targetIndex;        if ($preChLineIndex !== false && $AfterChLineIndex !== false) {            #刪掉指定行，插入新內容            $result = substr($fileCont, 0, $preChLineIndex + 1) . $replaceCont . "\n" . substr($fileCont, $AfterChLineIndex + 1);            file_put_contents($filePath, $result);            //$fp = fopen($filePath, "w+");            //fwrite($fp, $result);            //fclose($fp);        }    }}#在需要尋找的內容後一行新起一行插入內容function insertAfterTarget($filePath, $insertCont, $target){    $result = null;    $fileCont = file_get_contents($filePath);    $targetIndex = strpos($fileCont, $target); #尋找目標字串的座標    if ($targetIndex !== false) {        #找到target的後一個分行符號        $chLineIndex = strpos(substr($fileCont, $targetIndex), "\n") + $targetIndex;        if ($chLineIndex !== false) {            #插入需要插入的內容            $result = substr($fileCont, 0, $chLineIndex + 1) . $insertCont . "\n" . substr($fileCont, $chLineIndex + 1);            file_put_contents($filePath, $result);            //$fp = fopen($filePath, "w+");            //fwrite($fp, $result);            //fclose($fp);        }    }}#刪除內容所在的某一行function delTargetLine($filePath, $target){    $result = null;    $fileCont = file_get_contents($filePath);    $targetIndex = strpos($fileCont, $target); #尋找目標字串的座標    if ($targetIndex !== false) {        #找到target的前一個分行符號        $preChLineIndex = strrpos(substr($fileCont, 0, $targetIndex + 1), "\n");        #找到target的後一個分行符號        $AfterChLineIndex = strpos(substr($fileCont, $targetIndex), "\n") + $targetIndex;        if ($preChLineIndex !== false && $AfterChLineIndex !== false) {            #重新寫入刪掉指定行後的內容            $result = substr($fileCont, 0, $preChLineIndex + 1) . substr($fileCont, $AfterChLineIndex + 1);            file_put_contents($filePath, $result);            //$fp = fopen($filePath, "w+");            //fwrite($fp, $result);            //fclose($fp);        }    }}#擷取某段內容的行號/** * @param $filePath * @param $target   待尋找欄位 * @param bool $first   是否再匹配到第一個欄位後退出 * @return array */function getLineNum($filePath, $target, $first = false){    $fp = fopen($filePath, "r");    $lineNumArr = array();    $lineNum = 0;    while (!feof($fp)) {        $lineNum++;        $lineCont = fgets($fp);        if (strstr($lineCont, $target)) {            if($first) {                return $lineNum;            } else {                $lineNumArr[] = $lineNum;            }        }    }    return $lineNumArr;}?>

referer: http://www.cnblogs.com/zemliu/archive/2012/06/16/2551541.html