从PHP中的文本文件中读取[重复]

Question

This question already has an answer here:

• “Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP 28 answers

I am using this code to try and read the values in a text file.

$mapFile = fopen('config/map.txt', 'r') or die ("Can't open config file");
while ($line = fread($mapfile,filesize('config/map.txt')))
{
    echo $line;
}

Instead I keep getting this error.

Warning: fread() expects parameter 1 to be resource, null given

I am unsure what I am doing wrong. How can I read the text in the file properly?

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Answer 1

PHP variables are case sensitive. $mapFile !== $mapfile.

$mapFile = fopen('config/map.txt', 'r'); // don't need `or die()`
while ($line = fread($mapFile, filesize('config/map.txt')))
{
    echo $line;
}