Question

我有一个功能，可以回显网页的常用代码。如果我这样做的代码：

echo '<tr>'; 
CSCell("{$row['home_team']}/{$row['home_team']}",'home_home',$row, 1);
echo '</tr><tr>'; 
CSCell("{$row['home_team']}/Draw",'home_draw',$row, 1);
echo '</tr><tr>';

它没有问题。如果我这样做：

echo '<tr>' . CSCell("{$row['home_team']}/{$row['home_team']}",'home_home',$row, 1) . '</tr>';
echo '<tr>' . CSCell("{$row['home_team']}/Draw",'home_draw',$row, 1) . '</tr>';

它为每行代码输出一个额外的空行。据推测它最初是回声＆lt; tr＆gt;然后函数输出数据然后它返回null（因为没有指定返回）然后它再次开始回声（没有重新调用函数＆amp;打印＆lt; tr＆gt; 空字符串＆lt; / TR＆GT;）

如何阻止它重新回显tr HTML？该函数仅包含td回波数据？

我现在懒得让它返回，因为它需要回显的地方引用了其他部分。如何修改函数以便它可以用于回显和返回？

Answer 1

由于您已经依赖其他代码中的输出，只需在函数中添加第五个参数即可将其告诉data-src或// Register for Activities section of the form. document.querySelector(".activities").addEventListener("change", function(){ var main = document.getElementById("all"); var framework = document.getElementById("framework"); var libs = document.getElementById("libs"); var express = document.getElementById("express"); var node = document.getElementById("node"); var build = document.getElementById("build"); var npm = document.getElementById("npm"); var frameworkLbl = document.getElementById("frameworkLabel"); var libsLbl = document.getElementById("libsLabel"); var expressLbl = document.getElementById("expressLabel"); var nodeLbl = document.getElementById("nodeLabel"); // If the user selects a workshop, don't allow selection of a workshop at the same date and time -- you should disable the checkbox and visually indicate that the workshop in the competing time slot isn't available. if(framework.checked == true) { express.disabled = true; expressLbl.style.color = "grey"; } if(express.checked == true) { framework.disabled= true; frameworkLbl.style.color = "grey"; } if(libs.checked == true) { node.disabled = true; nodeLbl.style.color = "grey"; } if(node.checked == true) { libs.disabled = true; libsLbl.style.color = "grey"; } // When a user unchecks an activity, make sure that competing activities (if there are any) are no longer disabled. if(framework.checked == false) { express.disabled = false; expressLbl.style.color = "black"; } if(express.checked == false) { framework.disabled = false; frameworkLbl.style.color = "black"; } if(libs.checked == false) { node.disabled = false; nodeLbl.style.color = "black"; } if(node.checked == false) { libs.disabled = false; libsLbl.style.color = "black"; } });：

echo

然后使用return调用它：

function CSCell($a, $b, $c, $d, $return=false) {
    // build $output
    if($return) { return $output; }
    echo $output;
}

如果无法修改该函数，则构建一个包装器并缓冲输出并返回。我不知道函数是什么样的，所以你需要检查参数或依赖$return = true函数来验证它们：

echo '<tr>' . CSCell("{$row['home_team']}/Draw", 'home_draw', $row, 1, true) . '</tr>';

然后调用包装函数：

CSCell()

从函数回显或返回

1 个答案: