String 函数
PHP 手册

sscanf

(PHP 4 >= 4.0.1, PHP 5)

sscanfParses input from a string according to a format

说明

mixed sscanf ( string $str , string $format [, mixed &$... ] )

The function sscanf() is the input analog of printf(). sscanf() reads from the string str and interprets it according to the specified format , which is described in the documentation for sprintf().

Any whitespace in the format string matches any whitespace in the input string. This means that even a tab \t in the format string can match a single space character in the input string.

参数

str

The input string being parsed.

format

The interpreted format for str , which is described in the documentation for sprintf().

...

Optionally pass in variables by reference that will contain the parsed values.

返回值

If only two parameters were passed to this function, the values parsed will be returned as an array. Otherwise, if optional parameters are passed, the function will return the number of assigned values. The optional parameters must be passed by reference.

范例

Example #1 sscanf() Example

<?php
// getting the serial number
list($serial) = sscanf("SN/2350001""SN/%d");
// and the date of manufacturing
$mandate "January 01 2000";
list(
$month$day$year) = sscanf($mandate"%s %d %d");
echo 
"Item $serial was manufactured on: $year-" substr($month03) . "-$day\n";
?>

If optional parameters are passed, the function will return the number of assigned values.

Example #2 sscanf() - using optional parameters

<?php
// get author info and generate DocBook entry
$auth "24\tLewis Carroll";
$n sscanf($auth"%d\t%s %s"$id$first$last);
echo 
"<author id='$id'>
    <firstname>
$first</firstname>
    <surname>
$last</surname>
</author>\n"
;
?>

参见


String 函数
PHP 手册