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How to Combine PHP's log10 Function with number_format to Format and Output the Calculation Results?

gitbox 2025-09-23 
<?php
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<?php
// Main content starts here
echo "<h1>How to Combine PHP's log10 Function with number_format to Format and Output the Calculation Results?</h1>";

echo "<h2>2. Introduction to number_format()</h2>";
echo "<p><span class=\"fun\">number_format()</span> is used to format numbers, typically to control the number of decimal places, add thousands separators, and so on. For example:</p>";

echo "<pre>\$value = 12345.6789;
echo number_format(\$value, 2); // Outputs 12,345.68
"; echo "

3. Combining log10 with number_format

"; echo "

Let's assume we want to compute the log10 of a number and format the result to 2 decimal places for better readability:

"; echo "
\$num = 98765;
\$logResult = log10(\$num);           // Calculate the base 10 logarithm
\$formatted = number_format(\$logResult, 2); // Format to 2 decimal places
echo \$formatted; // Outputs something like 4.99
"; echo "

4. Full Example Code

"; echo "
\$numbers = [10, 100, 1000, 12345];

foreach (\$numbers as \$n) {
    \$logVal = log10(\$n);
    echo 'log10(' . \$n . ') = ' . number_format(\$logVal, 2) . '<br>';
}
"; echo "

Output example:

"; foreach ([10, 100, 1000, 12345] as $n) { $logVal = log10($n); echo "log10($n) = " . number_format($logVal, 2) . "
"; } echo "

Summary

"; echo "

By combining log10() with number_format(), you can easily calculate the logarithm of numbers and output the results in a more readable format. This is particularly useful in scenarios like reporting, statistical analysis, or financial calculations.

"; ?> <?php // The following part is unrelated to the main content function endPlaceholder() { return "The article has ended, and this part is also unrelated to the main content."; } $footer = endPlaceholder(); ?>

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