PHP writes array to file example code_PHP tutorial-PHP Tutorial-php.cn

There are many ways to write arrays into files in PHP. For example, if we want to make a cache file, we will convert the PHP array into a file and save it to a .php file. When calling, we can directly call this file.

php writes the array to the file through sequence and desequence. Please see the code

$file="./data/file.cache";
file_put_contents($file,serialize($array));//Write cache

The code is as follows

Copy code

代码如下

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$file="./data/file.cache";

$array = array("count" => "3000",

"num" =>"300");

//缓存

file_put_contents($file,serialize($array));//写入缓存
?>

$file="./data/file.cache";
$handle = fopen($file, "r");
$cacheArray = unserialize(fread($handle, filesize ($file)));
print_r($cacheArray);
?>

$file="./data/file.cache";

代码如下

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$write_array = array( '1' => 'oneone', '2' => 'two', '3' => 'three', '4' => 'four', '5' => 'five' ); //字符串处理
$string_start = ""; $string = $string_start.$string_process.$string_end; //开始写入文件
echo file_put_contents('test_array.php', $string);
?>

$array = array("count" => "3000",

"num" =>"300");

代码如下	复制代码
1，var_export():

//Cache

file_put_contents($file,serialize($array));//Write cache

代码如下	复制代码
array ( 1 => 'oneone', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five', )

$file="./data/file.cache";

$handle = fopen($file, "r");

$cacheArray = unserialize(fread($handle, filesize ($file)));

代码如下

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string(86) "array ( 1 => 'oneone', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five', )"
print_r($cacheArray); ?> //Write a test array into a PHP file:

The code is as follows	Copy code
<🎜>$write_array = array( '1' => 'oneone', '2' => 'two', '3' => 'three', '4' => 'four', '5 ' => 'five' ); //String processing $string_start = ""; $string = $string_start.$string_process.$string_end; //Start writing file echo file_put_contents('test_array.php', $string); ?>

Two functions are used here:

The code is as follows	Copy code
1, var_export():

·var_export — used to output or return a string representation of a variable. The difference between it and var_dump() is that var_export() can be used to return structural information about the variable passed to the function, and the representation it returns It is legal PHP code. If "echo $string_process;", you can see the output:

The code is as follows	Copy code
array ( 1 => 'oneone', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five', )

And this is what we want to write to the test_array.php file (minus the php tag); ·The var_dump() function is used to print information about variables. It is only used to "print" and does not return a value. Its prototype is void var_dump(...), let's "var_dump($string_process); ”, you can see the output result:

The code is as follows	Copy code
string(86) "array ( 1 => ; 'oneone', 2 => 'two', 3 => 'three', 4 => 'four', 5 => 'five', )"

You can see the output string(86) "...", which once again shows that var_export() returns a string.

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