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SplFileObject::fgetcsv

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

SplFileObject::fgetcsvGets line from file and parse as CSV fields

Опис

public SplFileObject::fgetcsv(string $separator = ",", string $enclosure = "\"", string $escape = "\\"): array|false

Gets a line from the file which is in CSV format and returns an array containing the fields read.

Зауваження: The locale settings are taken into account by this function. For example, data encoded in certain one-byte encodings may be parsed incorrectly if LC_CTYPE is en_US.UTF-8.

Параметри

separator

The field delimiter (one single-byte character only). By default , or the value set by a prior call to SplFileObject::setCsvControl().

enclosure

The field enclosure character (one single-byte character only). By default " or the value set by a prior call to SplFileObject::setCsvControl().

escape

The escape character (at most one single-byte character). By default \ or the value set by a prior call to SplFileObject::setCsvControl(). An empty string ("") disables the proprietary escape mechanism.

Зауваження: Usually an enclosure character is escaped inside a field by doubling it; however, the escape character can be used as an alternative. So for the default parameter values "" and \" have the same meaning. Other than allowing to escape the enclosure character the escape character has no special meaning; it isn't even meant to escape itself.

Увага

As of PHP 8.4.0, depending on the default value of escape is deprecated. It needs to be provided explicitly either positionally or by the use of Named Arguments, or by a call to SplFileObject::setCsvControl().

Увага

Якщо значенням параметра escape не є порожній рядок (""), то результатом може бути CSV, що не відповідає вимогам » RFC 4180 або не зможе оброблятись функціями PHP CSV. Типовим значенням параметра escape є "\\", але рекомендовано явно вказати порожній рядок. Типове значення зміниться в наступній версії PHP, та не раніше, ніж в PHP 9.0.

Значення, що повертаються

Returns an indexed array containing the fields read, or false on error.

Зауваження:

A blank line in a CSV file will be returned as an array comprising a single null field unless using SplFileObject::SKIP_EMPTY | SplFileObject::DROP_NEW_LINE, in which case empty lines are skipped.

Помилки/виключення

Throws a ValueError if separator or enclosure is not one byte long.

Throws a ValueError if escape is not one byte long or the empty string.

Журнал змін

Версія Опис
8.4.0 Relying on the default value of escape is now deprecated.
7.4.0 The escape parameter now also accepts an empty string to disable the proprietary escape mechanism.

Приклади

Приклад #1 SplFileObject::fgetcsv() example

<?php
$file
= new SplFileObject("data.csv");
while (!
$file->eof()) {
var_dump($file->fgetcsv());
}
?>

Приклад #2 SplFileObject::READ_CSV example

<?php
$file
= new SplFileObject("animals.csv");
$file->setFlags(SplFileObject::READ_CSV);
foreach (
$file as $row) {
list(
$animal, $class, $legs) = $row;
printf("A %s is a %s with %d legs\n", $animal, $class, $legs);
}
?>

Contents of animals.csv

crocodile,reptile,4
dolphin,mammal,0
duck,bird,2
koala,mammal,4
salmon,fish,0

Поданий вище приклад виведе щось схоже на:

A crocodile is a reptile with 4 legs
A dolphin is a mammal with 0 legs
A duck is a bird with 2 legs
A koala is a mammal with 4 legs
A salmon is a fish with 0 legs

Прогляньте також

add a note

User Contributed Notes 6 notes

up
13
android991 at gmail dot com
5 years ago
Be aware.
There is bug 46569 persists that breaks usage of SplFileObject::fgetcsv() after SplFileObject::seek()-ing to a non-zero position and then returns the contents of wrong line - off by one
<?php
$file
= new SplFileObject('foo/bar.csv');
$file->seek(1);
print_r($file->fgetcsv()); // reads 3rd line against 2nd
up
4
InvisibleSmiley
3 years ago
Not that this may return NULL instead of FALSE depending on the given SplFileObject flags in versions prior to PHP 8.1.

Change: https://github.com/php/php-src/commit/188b1d4c7c7b3482584e248522d94e06ba616a1c

Testcase: https://3v4l.org/6dQTT
up
3
Denitz
6 years ago
If your CSV doesn't have enclosures, you can face an issue with default " identified as enclosure in data. Empty $enclosure is not allowed, but you can use same $enclosure as $delimiter (\n by default) to emulate empty enclosure.
up
2
v-fpiris at teknober dot com
13 years ago
after setting the delimiter '\t' fgetcsv() truncates the value when it is empty string

workaround:

<?php
$file
= new SplFileObject($path);
$file->setFlags(SplFileObject::DROP_NEW_LINE);
while (
$file->valid()) {
$line = $file->fgets();
$line = explode("\t", $line);

print_r($line);
}
?>
up
2
vaughn dot clayton+php at servicetrade dot com
12 years ago
Note that due to bugs 55807 and 61032, introduced in 5.3.8, if the csv in example #2 has a newline character at the end of each line, the foreach will execute 6 times.

The last time through the loop $row will be bool(false). This is true even if using SplFileObject::SKIP_EMPTY and SplFileObject::DROP_NEW_LINE.

Until the bug is fixed, the workaround is to also add SplFileObject::READ_AHEAD to your setFlags() call.
up
1
jbrauer
4 years ago
Also while the enclosure character cannot be NULL you can set it to ASCII NUL character chr(0) with the same practical effect.
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