When using URL as a filename, such as "http://..." or "php://stdin", and also have the fopen wappers on, and you get a 'RuntimeException' error, try using "NoRewindIterator" class to a SplFileObject instance.
<?php
$url = 'http://sample.com/data.csv';
$file = new NoRewindIterator( new SplFileObject( $url ) );
foreach ($file as $line_num => $line) {
echo "Line $line_num is $line";
}
?>
While opening a file, a rewind method will be called, but these URL iterators cannot be rewind, so you'll get a "Fatal error: Uncaught exception 'RuntimeException' with message 'Cannot rewind file ...'" error.
SplFileObject::__construct
(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplFileObject::__construct — Construct a new file object
Descrizione
public SplFileObject::__construct(
string
string
bool
?resource
)
string
$filename,string
$mode = "r",bool
$useIncludePath = false,?resource
$context = null)
Construct a new file object.
Elenco dei parametri
-
filename -
The file to read.
SuggerimentoÈ possibile utilizzare una URL come un nome di file con questa funzione se fopen wrappers è stata abilitata. Vedere fopen() per maggiori informazioni su come specificare i nomi di file. Vedere Supported Protocols and Wrappers per i link verso le informazioni sulle capacità dei vari wrapper, note sul loro uso, informazioni sulle variabili predefinite che forniscono.
-
mode -
The mode in which to open the file. See fopen() for a list of allowed modes.
-
useIncludePath -
Whether to search in the include_path for
filename. -
context -
A valid context resource created with stream_context_create().
Errori/Eccezioni
Throws a RuntimeException if the filename cannot be opened.
Throws a LogicException if the filename is a directory.
Esempi
Example #1 SplFileObject::__construct() example
This example opens the current file and iterates over its contents line by line.
<?php
$file = new SplFileObject(__FILE__);
foreach ($file as $line_num => $line) {
echo "Line $line_num is $line";
}
?>Il precedente esempio visualizzerà qualcosa simile a:
Line 0 is <?php
Line 1 is $file = new SplFileObject(__FILE__);
Line 2 is foreach ($file as $line_num => $line) {
Line 3 is echo "Line $line_num is $line";
Line 4 is }
Line 5 is ?>
Vedere anche:
- SplFileInfo::openFile() - Gets an SplFileObject object for the file
- fopen() - Apre un file o un URL
add a note
User Contributed Notes 2 notes
KEINOS at blog.keinos.com ¶
7 years ago
