如何创建PHP自定义函数 实现先调用str_replace再对结果执行ucfirst

调整方案 #

你代码的核心问题是fusion函数内调用str_replace时没有传入参数，str_replace需要按顺序传入「查找值、替换值、目标字符串」三个参数，正好对应你定义的fusion函数的三个入参，仅需要修改fusion函数部分即可实现需求。

修改后的完整代码 #

<?php 
    $var1 = "Beginner PHP is starting to";
    $var2 = ":";
    $var3 = "make sense";
    $var4 = "prepare";
    $var5 = "excite ";
    $var6 = " me!";
    $var7 = $var1;
    $var7 .= $var2;
    $var8 = $var5;
    $var8 .=$var6;  

    function fusion($find, $replace, $string)
    {
        // 按参数顺序传入str_replace即可
        $vegeta = str_replace($find, $replace, $string);
        $goku = ucfirst($vegeta);
        echo $goku;
    }
?>

<?php echo $var7; ?> <br />
<?php echo $var3; ?> <br />
<?php echo $var4; ?> <br />
<?php echo $var8; ?> <br /><br /><br />

<?php echo $var7; ?> <br />
<?php fusion("make sense", "force me", $var3); ?> <br />
<?php fusion("excite me", "to think outside the box", $var8); ?>

运行效果 #

调整后调用fusion函数的输出结果为：

Force me
To think outside the box

内容的提问来源于stack exchange，提问作者mayorwest