PHP writes an array to the file instance code _php tutorial

There are many ways to write an array to a file in PHP, like when we want to make a cache file, we convert the PHP array into a file and then save it to a. php file, which is called directly when called.

PHP writes an array to a file, which is implemented by sequence and inverse sequence. Please look at the code

$file = "./data/file.cache";
File_put_contents ($file, serialize ($array));//write Cache

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$file = "./data/file.cache"; $array = Array ("Count" = "3000", "num" = "300"); Cache File_put_contents ($file, serialize ($array));//write Cache ?> $file = "./data/file.cache"; $handle = fopen ($file, "R"); $cacheArray = Unserialize (Fread ($handle, FileSize ($file))); Print_r ($cacheArray); ?>

Write an array of tests to a PHP file:

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$write _array = Array (' 1 ' = ' = ' Oneone ', ' 2 ' = ' + ', ' 3 ' = ' three ', ' 4 ' = ' Four ', ' 5 ' = ' five '); String processing $string _start = " "; $string = $string _start. $string _process. $string _end;//start writing to file echo file_put_contents (' test_array.php ', $string); ?>

Two functions are used here:

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1,var_export ():

var_export-is used to output or return a string representation of a variable, and the difference between it and var_dump () is that var_export () can be used to return the structure information about the variable passed to the function, and its return representation is a valid PHP code if "echo $ string_process; ", you can see the output:

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Array (1 = ' Oneone ', 2 = ' both ', 3 = ' three ', 4 = ' four ', 5 = ' five ',)

And it's what we're going to write to the test_array.php file (minus the PHP tag);

The var_dump () function is used to print information about a variable, it is used only to "print", not return a value, its prototype is void Var_dump (...), we come to "var_dump ($string _process);", you can see the output:

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String "Array (1 = ' Oneone ', 2 = '", 3 = ' three ', 4 = ' four ', 5 = ' five ',) "

You can see the output of string (86) "..." again, stating that Var_export () returns a string.

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