(PHP 6 >= 6.0.0)
is_buffer — Finds whether a variable is a native unicode or binary string
Finds whether the given variable is a native unicode or binary string.
The variable being evaluated.
Returns TRUE if var is a native unicode or binary string, FALSE otherwise.
Example #1 is_buffer() example
<?php
// Declare some variables with different types
$types = array(
'unicode' => 'Unicode string',
'binary' => b'Binary string',
'resource' => fopen('php://stdin', 'r'),
'integer' => 42
);
// Test which types thats a buffer
foreach($types as $type => $value)
{
if(is_buffer($value))
{
echo $type . ' is a either a unicode or binary string';
}
else
{
echo $type . ' is not a buffer value';
}
echo PHP_EOL;
}
?>
上例将输出：
unicode is a either a unicode or binary string binary is a either a unicode or binary string resource is not a buffer value integer is not a buffer value