I need to create a file that contains PHP code. This code comes from a string like "<?php class foo{ } ?>" but when I give a echo it just cuts the reserved words.
How to turn the string into plain text without missing a word?
I will create a file by fopen .
Use htmlentities :
echo htmlentities($suaString);
This is only on display (it looks like your problem is there). In the text file, your string should be written without escaping anything.
Creating and reading the file with fopen from php
//Criando arquivo
$arq = fopen('arquivo.txt', 'a+');
//Gravando tags sem perder o contéudo do texto coloque aspas simples
fwrite($arq, '<?php echo $variavel; >'."\r\n");
fclose($arq);
//Lendo o arquivo
$arq = fopen('arquivo.txt', 'r');
//Pegando o conteudo
$lin = fread($arq, filesize('arquivo.txt'));
//Imprimindo o conteudo
echo htmlentities($lin);
References: link