PHP uses file_get_contents to read large files, _php tutorial

PHP uses file_get_contents to read large files,

When we encounter a large text file size, such as more than dozens of m or even hundreds of m a few grams of large files, with Notepad or other editor open often does not succeed, because they all need to put the contents of the file in memory, there will be memory overflow and open the error, In this case we can use PHP's file read function file_get_contents () for segmented reads.

Function description
String file_get_contents (String $filename [, bool $use _include_path [, Resource $context [, int $offset [, int $maxlen] ]]] )
As with file (), only file_get_contents () reads a file into a string. Reads the contents of length MaxLen at the position specified by the parameter offset. If it fails, file_get_contents () returns FALSE.

The file_get_contents () function is the preferred method for reading the contents of a file into a string. If operating system support also uses memory-mapping techniques to enhance performance.

Application:

Copy the Code code as follows:
$str = $content =file_get_contents ("2.sql", false,null,1024*1024,1024);
Echo $str;

You can use the Fread () function if you only want to fragment read for a smaller file and finish reading this

Copy the Code code as follows:
$fp =fopen (' 2.sql ', ' R ');
while (!feof ($fp)) {
$str. =fread ($fp, FileSize ($filename)/10);//10 1 per read-out file
For processing
}

Echo $str;

The above is how to use the File_get_contents function to read large files, super simple, the need for small partners to move directly!

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