считать файл в строку php

Используйте функцию =

string fread (указатель на файл, длина) ;

пример =

<?php
// get contents of a file into a string
$filename = "/usr/local/something.txt";
$handle = fopen($filename, "r");
$contents = fread($handle, filesize($filename));
fclose($handle);
?>

fread() reads up to length bytes from the file pointer referenced by handle. Reading stops as soon as one of the following conditions is met:

length bytes have been read
EOF (end of file) is reached
a packet becomes available or the socket timeout occurs (for network streams)
if the stream is read buffered and it does not represent a plain file, at most one read of up to a number of bytes equal to the chunk size (usually 8192) is made; depending on the previously buffered data, the size of the returned data may be larger than the chunk size.

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Источники(читать подробнее)=
http://www.znannya.org/?view=PHP_file_read

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