我正在寻找echo逗号分隔的数组元素，例如:
Element1, Element2, Element3, Element4, Element5, Element6
但是，为了保持回显元素的整洁，我可能需要在每行的第二个元素之后转到一个新行，例如
Element1, Element2,
Element3, Element4,
Element5, Element6
正如我正在做的:
<?php
$labels = Requisitions::getLabelNames($id);
foreach($labels as $label) {
$labels_array[] = $label['name'];
}
echo implode(' ,', $labels_array);
?>
显然得到:
Element1, Element2, Element3, Element4, Element5, Element6
那么我如何使用implode()或其他方式在一行的每个第二个元素之后做换行?
<?php
$labels = array('Element1', 'Element2', 'Element3', 'Element4', 'Element5', 'Element6');
# Put them into pairs
$pairs_array = array_chunk($labels, 2);
# Use array_map with custom function
function joinTwoStrings($one_pair) {
return $one_pair[0] . ', ' . $one_pair[1];
}
$pairs_array = array_map('joinTwoStrings', $pairs_array);
echo implode(',' . PHP_EOL, $pairs_array);
您可以使用foreach来实现它，我将为您粘贴代码，这将为您提供所需的输出
<?php
$labels = array("Element1", "Element2", "Element3", "Element4", "Element5","Element6");
$key = 1;
$lastkey = sizeof($labels);
foreach($labels as $value)
{
if($key%2)
{
if($key==$lastkey)
{
echo $value;
}
else
{
echo $value.",</br>";
}
}
else
{
if($key==$lastkey)
{
echo $value."</br>";
}
else
{
echo $value.",</br>";
}
}
$key++;
}
?>
未经测试，但这样的东西应该可以工作
$i = 1;
foreach($labels as $label) {
echo $label;
// add a comma if the label is not the last
if($i < count($labels)) {
echo ", ";
}
// $i%2 is 0 when $i is even
if($i%2==0) {
echo "<br>"; // or echo "'n";
}
$i++;
}
为了美观:
$labels_array=array("Element 1","Element 2","Element 3","Element 4","Element 5","Element 6");
echo implode(",'n",array_map(function($i){ // change to ",<br />" for HTML output
return implode(", ",$i);
},array_chunk($labels_array,2)));
在线演示
<?php
$labels = Requisitions::getLabelNames($id);
foreach($labels as $label) {
$labels_array[] = $label['name'];
}
for($i=0;$i<count($labels_array);$i++)
{ echo($labels_array[$i]);
if($i % 2 != 0)
{
echo("'n");
}else{echo(",");}
}
?>
$i = 1;
$str = '';
foreach($labels AS $label)
{
$str += "$label, ";
if ($i % 2 == 0)
{
$str += "'n";
}
$i++;
}
//Remove last 2 chars
$str = substr($str,0,(strlen($str)-2));
除非您需要数组用于其他用途，否则这只是构建字符串…
<?php
$labels = Requisitions::getLabelNames($id);
$s='';
$i=0;
$l=count($labels);
foreach($labels as $label){
$s.=$label['name'];
// Append delimeter. Makes sure every second, and the last one, will be a line break
$s.=((++$i%2)&&($l!=$i))?' ,':"'n";
}
echo $s;
?>