PHP fopen() Funksie

Voorbeeld

Maak lêer oop, lees reëls - totdat EOF bereik word:

<?php
$file = fopen("test.txt", "r");

//Output lines until EOF is reached
while(! feof($file)) {
$line = fgets($file);
echo $line. "<br>";
}

fclose($file);
?>

Definisie en gebruik

Die fopen() funksie maak 'n lêer of URL oop.

Let wel: Wanneer jy na 'n tekslêer skryf, maak seker dat jy die korrekte lyneindkarakter gebruik! Unix-stelsels gebruik \n, Windows-stelsels gebruik \r\n, en Macintosh-stelsels gebruik \r as die lyneindkarakter. Windows bied 'n vertaalvlag ('t') wat \n na \r\n sal vertaal wanneer jy met die lêer werk. Jy kan ook 'b' gebruik om binêre modus af te dwing. Om hierdie vlae te gebruik, spesifiseer óf 'b' óf 't' as die laaste karakter van die modusparameter.

Sintaksis

fopen(filename, mode, include_path, context)

Parameterwaardes

Parameter	Description
filename	Required. Specifies the file or URL to open
mode	Required. Specifies the type of access you require to the file/stream. Possible values: "r" - Read only. Starts at the beginning of the file "r+" - Read/Write. Starts at the beginning of the file "w" - Write only. Opens and truncates the file; or creates a new file if it doesn't exist. Place file pointer at the beginning of the file "w+" - Read/Write. Opens and truncates the file; or creates a new file if it doesn't exist. Place file pointer at the beginning of the file "a" - Write only. Opens and writes to the end of the file or creates a new file if it doesn't exist "a+" - Read/Write. Preserves file content by writing to the end of the file "x" - Write only. Creates a new file. Returns FALSE and an error if file already exists "x+" - Read/Write. Creates a new file. Returns FALSE and an error if file already exists "c" - Write only. Opens the file; or creates a new file if it doesn't exist. Place file pointer at the beginning of the file "c+" - Read/Write. Opens the file; or creates a new file if it doesn't exist. Place file pointer at the beginning of the file "e" - Only available in PHP compiled on POSIX.1-2008 conform systems.
include_path	Optional. Set this parameter to '1' if you want to search for the file in the include_path (in php.ini) as well
context	Optional. Specifies the context of the file handle. Context is a set of options that can modify the behavior of a stream

Tegniese besonderhede

Terugkeerwaarde:	'n Lêerwyserhulpbron oor sukses, ONWAAR en 'n fout by mislukking. Jy kan die fout wegsteek deur 'n "@" voor die funksienaam by te voeg.
PHP weergawe:	4,3+
PHP Changelog:	PHP 7.1: Bygevoeg "e" opsie PHP 5.2: Bygevoeg "c" en "c+" opsies

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