PHP 에서 텍스트 파일을 라인 (line) 단위로 읽는 방법을 알아보자.
1. fgets() 함수
fgets() 함수는 파일 포인터로부터 하나의 라인을 읽는다. 읽을 데이터가 없을 경우에는 false 를 리턴한다.
텍스트 파일을 읽기 전용 모드로 연다.
$fp = fopen(“xtmci.txt”, “r”);
while 루프와 fgets() 함수로 파일을 읽어보자.
while (($line = fgets($fp)) !== false) { // 리턴값이 false 가 아닐 경우 계속 읽는다.
echo $line; // 읽은 라인을 출력한다. $line 변수에는 개행 문자가 포함되어 있다.
}
파일을 닫는다.
fclose($fp);
읽어들인 라인에서 개행 문자를 제거할 때는 rtrim() 함수를 쓴다.
$line = rtrim($line);
2. file() 함수
file() 함수는 파일 전체를 읽어 라인 단위로 배열에 저장한다. 읽기에 실패할 경우에는 false 를 리턴한다.
텍스트 파일을 읽어 배열에 저장해 보자.
$arr_lines = file(“xtmci.txt”);
배열의 각 요소는 텍스트 파일의 각 라인에 대응한다. 읽어들인 개행 문자는 보존된다.
foreach 루프로 배열의 각 요소를 출력한다.
foreach ($arr_lines as $line) {
echo $line;
}
file() 함수를 쓸 경우에는 별도로 파일을 열고 닫는 작업이 필요없다. 함수 내부에서 자동으로 수행되기 때문이다.
10 replies on “PHP에서 텍스트 파일을 한 줄씩 (line by line) 읽기”
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