Can you Use an if Statement Within String Concatenation in PHP?

Can an if Statement Be Used Within Concatenation?

In the provided PHP code, an attempt is made to use an if statement within concatenation without success. Can this approach be used, or is it a syntax error?

Answer:

No, it is not possible to use an if statement directly within string concatenation. An if statement is an independent statement that cannot be embedded within another statement.

Instead, the shorthand ternary operator can be used to conditionally output specific sections of the string.

<code class="php">$given_id = 1;
while ($row = mysql_fetch_array($sql)) {
    $display = '<a href="' . $row['info'] . '" onMouseOver="' .
        ($row['type'] == "battle" ? 'showB' : 'showA')() . ';">
        <div class="' . $row['type'] . "_alert\" style=\"float:left; margin-left:-22px;\" id=\"" . $given_id . '"</div></a>';
}</code>

Here, the ternary operator assigns different values to $display based on the value of $row['type'].

For complex conditions, nested ternary operators can also be used:

<code class="php">$i = 0;
$j = 1;
$k = 2;
$result = 'Greater One is' . $i > $j ?
    ( $i > $k ? 'i' : 'k' ) :
    ( $j > $k ? 'j' :'k' ) . '.';</code>

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