vfprintf
<?php
$string = 'The site runs on PHP '.phpversion();
preg_match('/php ((\d)\.\d\.\d+)/i',$string,$matches);
print_r($matches);
vprintf('Match: %s<br /> Version %s; Major:%d.',$matches);
?>
output:
Array ( [0] => PHP 5.2.5 [1] => 5.2.5 [2] => 5 )
Match: PHP 5.2.5 Version 5.2.5; Major:5.
For preg_match:
If matches is provided, then it is filled with the results of search. $matches[0] will contain the text that matched the full pattern, $matches[1] will have the text that matched the first captured parenthesized subpattern, and so on.
vprintf
(PHP 4 >= 4.1.0, PHP 5)
vprintf — フォーマットされた文字列を出力する
説明
int vprintf
( string
$format
, array $args
)
formatに基づき文字列フォーマットされた文字列を出力します
(フォーマットは sprintf() のドキュメントに既述されています)。
printf() と動作は同じですが、可変長の引数ではなく、 配列を引数として受け取ります。
返り値
出力された文字列の長さを返します。
例
例1 vprintf(): 整数のゼロ埋め
<?php
vprintf("%04d-%02d-%02d", explode('-', '1988-8-1')); // 1988-08-01
?>
add a note
User Contributed Notes
vprintf
taken from "Php Phrasebook"
15-Jun-2008 10:55
badcop666 at hotmail dot com
28-Nov-2007 05:38
For blocks of text, sprintf() is slow according to my tests.
Also, having the mapping between place-holders and the list of actual variables or datastructures often makes this code difficult to read. But the printf() family are widely supported and have a huge range of nice features. Performance is a cold mistress though!
From an ease-of-reading and maintenance, debugging point of view, I much prefer HEREDOC and "...{$variable}..." methods.
For a block of HTML markup with place holders, the fastest by far was:-
?>
<div> markup etc<?= $variable ?>more markup
<?
My tests comprised 20 runs of a loop of 1 million iterations with output buffering, ditching the buffer on each loop.
The timings ranged from average 2.1msec/million repetitions for the <?= $var ?> method up to 7.6msec/million using printf().
I'll try some benchmarking tools too, since I just wrote this myself and it could be introducing bias, but they've run on dev servers with low load.
Hopefully interesting.
tehjosh at gamingg dot net
29-Jul-2007 07:19
To toolofthesystem at gmail dot com:
You don't need to use output buffering with vprintf() because you can use vsprintf(), which has the same functionality as vprintf(), except that it returns the resulting string instead of outputting it.
toolofthesystem at gmail dot com
27-Mar-2007 08:42
This function comes useful sometimes when trying to list information returned from MySQL:
function print_sql($query,$printf){
$sql_sql = mysql_query($query);
while($sql = mysql_fetch_row($sql_sql)){
vprintf($printf,$sql);
}
}
Unfortunately, this seems to sneak its way past output buffering when I tried creating an argument to allow it to be contained in a returned string... either that or I didn't do it right.
soylent at soylentgreens dot com
10-Dec-2006 01:49
I wanted to achieve (something like) this:
<?
$format = "A %s %s %s.\n";
$array1 = Array("monkey", "cow", "rooster");
$array2 = Array("eats", "goes", "crows");
$array3 = Array("bananas", "moo", "in the morning");
printf($format, $array1, $array2, $array3);
?>
Output:
A monkey eats bananas.
A cow goes moo.
A rooster crows in the morning.
but I couldn't find any php function to put in for printf that would work (vprintf comes close). So I created this little function (and used it to create a select box):
<?
/*
printf_arrays( string format, [array args[, array ...]] )
*/
function printf_arrays($format) {
$args = func_get_args();
array_shift($args); // get rid of format
for($i=0; $i<count($args[0]); $i++) {
$pfargs = Array();
foreach($args as $arr) $pfargs[] = (is_array($arr) && $arr[$i]) ? $arr[$i] : '';
vprintf($format, $pfargs);
}
}
$months = Array(
'01'=>'Jan',
'02'=>'Feb',
/* etc. */
);
?>
<select name="month">
<? printf_arrays('<option value="%s">%s</option>', array_keys($months), array_values($months)) ?>
</select>
Anyone else have any better ideas? Is there a built-in php function I missed that does this already?
caleb at tekhawk dot com
29-Nov-2006 02:19
i know that you can use %1$s or %3$s to select the first or third string but how can you or can you use array names to select it
something like %'user'$s $'email'$s
i tend to add things to my databases over time and this could save loads of recoding
WebMaestro (asiby at hotmail dot com)
13-Mar-2005 12:40
<?php
$fruits = array(1, 'banana',1, 'apples', 3, 'oranges', 2, 'peaches');
vprintf("I have %d %s, %d %s, %d %s and %d %s.", $fruits);
?>
Output:
I have 1 banana, 1 apples, 3 oranges and 2 peaches.