PHP中数组转换成json字符串程序代码_PHP教程

function array_to_json($array) {
if (! is_array ( $array )) {
return false;
}

$associative = count ( array_diff ( array_keys ( $array ), array_keys ( array_keys ( $array ) ) ) );
if ($associative) {

$construct = array ();
foreach ( $array as $key => $value ) {

// We first copy each key/value pair into a staging array,
// formatting each key and value properly as we go.

// Format the key:
if (is_numeric ( $key )) {
$key = "key_$key";
}
$key = """ . addslashes ( $key ) . """;

// Format the value:
if (is_array ( $value )) {
$value = array_to_json ( $value );
} else if (! is_numeric ( $value ) || is_string ( $value )) {
$value = """ . addslashes ( $value ) . """;
}

// Add to staging array:
$construct [] = "$key: $value";
}

// Then we collapse the staging array into the JSON form:
$result = "{" . implode ( ",", $construct ) . "}";

} else { // If the array is a vector (not associative):

$construct = array ();
foreach ( $array as $value ) {

// Format the value:
if (is_array ( $value )) {
$value = array_to_json ( $value );
} else if (! is_numeric ( $value ) || is_string ( $value )) {
$value = """ . addslashes ( $value ) . """;
}

// Add to staging array:
$construct [] = $value;
}

// Then we collapse the staging array into the JSON form:
$result = "[" . implode ( ", ", $construct ) . "]";
}

return $result;
}

if($_GET['enews']=='ok'){
echo json_encode(array('a'=>'王进'));exit;
}
?>