How to convert php files into strings

The file_get_contents() function can be used in php to convert the file into a string. It can read the contents of the file into a string. The syntax is "file_get_contents(file,include_path,context,start,maxlen) ".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In PHP, you can use the file_get_contents() function to convert the file into a string.

The file_get_contents() function can read the contents of the file into a string. The syntax format of the function is as follows:

file_get_contents(file,include_path,context,start,maxlen)

The parameter description is as follows:

• file : The file to be read;
• include_path: Optional parameter, used to set whether you want to search for the file in include_path, the default is FALSE;
• context: Optional parameter, used To represent a valid context resource created using the stream_context_create() function. If you do not need to customize the context, you can use NULL to ignore it;
• start: Optional parameter, used to set the starting position of reading in the file . Note that this parameter cannot be used for remote files;
• maxlen: Optional parameter, used to set the number of bytes to be read. The default is to read the entire content of the file.

Note: When the file_get_contents() function fails to execute, it may return FALSE of Boolean type, or it may return a non-Boolean value (such as a null character). Therefore, the === operator is generally used to test the return value of this function.

Example:

There is such a text file, the content is:

Use the file_get_contents() function to convert the file into a string

<?php
header("Content-type:text/html;charset=utf-8");
$file = &#39;test.txt&#39;;
$filestr = file_get_contents($file);
if ($filestr) {
	echo $filestr;
} else {
	echo &#39;失败！&#39;;
}
?>

Output result:

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