下面的代码显示了存储在数组中的所有值,但我的目标输出仅显示以字母 T 开头的值。
有人可以帮我转换此代码以仅提取以字母 T 开头的值吗?
<?php
$cars=array("Volvo1","Volvo2","Volvo3","Volvo4","Volvo5","Volvo6",
"BMW1","BMW2","BMW3","BMW4","BMW5","BMW"6,
"Toyota1","Toyota2","Toyota3","Toyota4","Toyota5","Toyota6");
$arrlength=count($cars);
for($x = 0;$x < $arrlength; $x++)
{
echo $cars[$x];
echo "<br>";
}
?>
最佳答案
你可以尝试这样的事情吗?
<?php
$cars=array("Volvo1","Volvo2","Volvo3","Volvo4","Volvo5","Volvo6","BMW1","BMW2","BMW3","BMW4","BMW5","BMW", "Toyota1","Toyota2","Toyota3","Toyota4","Toyota5","Toyota6");
$arrlength=count($cars);
for($x = 0;$x < $arrlength; $x++)
{
// substr(string, start, length)
if(substr($cars[$x], 0, 1) === 'T')
{
echo $cars[$x];
echo "<br>";
}
// or use this
// 0 is first character of the string
if($cars[$x][0] === 'T')
{
echo $cars[$x];
echo "<br>";
}
}
?>
但更好的方法是不使用 for
循环,而是使用 foreach
循环,如下所示,
<?php
$cars=array("Volvo1","Volvo2","Volvo3","Volvo4","Volvo5","Volvo6","BMW1","BMW2","BMW3","BMW4","BMW5","BMW", "Toyota1","Toyota2","Toyota3","Toyota4","Toyota5","Toyota6");
foreach($cars as $car)
{
// substr(string, start, length)
if(substr($car, 0, 1) === 'T')
{
echo $car;
echo "<br>";
}
// or use this
// 0 is first character of the string
if($car[0] === 'T')
{
echo $car;
echo "<br>";
}
}
?>
关于php - 显示特定字母的数组值,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/14856787/