我需要通过“,”然后“:”进行爆炸。足够简单...
$alttitle = "35:title1,36:title2, 59:title5"
$replacetitles = explode(",",$alttitle);
for ($i = 0 ; $i < count($replacetitles) ; $i++) {
$replacetitle[] = explode(":", $replacetitles[$i]);
}
这会产生...
数组 ( [0] => 数组 ( [0] => 35 [1] => 标题 1 ) [1] => 数组 ( [0] => 36 [1] => 标题 2 ) [2] => 数组 ( [0] => 59 [1] => 标题5) )
...但是数字 35,36,59 是唯一的,所以我希望它成为数组的键?
数组 ( [35] => 标题1 [36] => 标题2 [59] => 标题5 )
只需在循环时设置即可:
$alttitle = "35:title1,36:title2, 59:title5"
$tmptitles = explode(",",$alttitle);
$replacetitle = array();
foreach($tmptitles as $tmptitle) {
$tmparr = explode(":", trim($tmptitle));
$replacetitle[intval($tmparr[0])] = trim($tmparr[1]);
}
通过上述操作,您将创建最少迭代次数的数组。
这是另一个但可能有点过分的替代方案。
if (!preg_match_all('/([0-9]+)\s*:\s*([^,]+)/', $alttitle, $matches)) {
//not valid
}
$array = array_combine($matches[1], $matches[2]);
print_r($array);
这是我的看法
$alttitle = "35:title1,36:title2, 59:title5";
$entries = preg_split( "/ *, */", $alttitle );
$flattened = array();
for ( $i = 0, $l = count( $entries ); $i < $l; $i++)
{
list( $index, $value ) = explode( ':', $entries[$i] );
$flattened[$index] = $value;
}
print_r( $flattened );
现在进行速度测试与爆炸/修剪
$testData = implode( ',', array_fill( 1, 10000, "a,b, c, d" ) );
$start = microtime( true );
$entries = explode( ",", $testData );
$ouptput = array();
for ( $i = 0, $l = count( $entries ); $i < $l; $i++ )
{
$output[] = trim( $entries[$i] );
}
echo "explode/trim test took: ", ( microtime( true ) - $start ), ' seconds<br>';
unset( $start, $entries, $output );
$start = microtime( true );
$entries = preg_split( "/ *, */", $testData );
$ouptput = array();
for ( $i = 0, $l = count( $entries ); $i < $l; $i++ )
{
$output[] = $entries[$i];
}
echo "preg_split test took: ", ( microtime( true ) - $start ), ' seconds<br>';
您可以通过仅爆炸一次来简化过程,然后在 if 循环内调用
sscanf()
。 %d
会将数值转换为整数并消除有关空格的担忧。
%s
遇到空格时会停止匹配。如果这是一个问题,请使用否定字符类或更改函数。代码:(演示)
$alttitle = "35:title1,36:title2, 59:title5";
foreach (explode(',', $alttitle) as $pair) {
[$id, $result[$id]] = sscanf($pair, '%d:%s');
}
var_export($result);
输出:
array (
35 => 'title1',
36 => 'title2',
59 => 'title5',
)
在您的代码之后,您可以添加以下内容:
$ar = array();
for ($i = 0; $i < count($replacetitle); $i++) {
$ar[$replacetitle[$i][0]] = $replacetitle[$i][1];
}