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    <h3>Editing: HasTimestamps.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

namespace Illuminate\Database\Eloquent\Concerns;

use Illuminate\Support\Facades\Date;

trait HasTimestamps
{
    /**
     * Indicates if the model should be timestamped.
     *
     * @var bool
     */
    public $timestamps = true;

    /**
     * Update the model's update timestamp.
     *
     * @return bool
     */
    public function touch()
    {
        if (! $this-&gt;usesTimestamps()) {
            return false;
        }

        $this-&gt;updateTimestamps();

        return $this-&gt;save();
    }

    /**
     * Update the creation and update timestamps.
     *
     * @return void
     */
    public function updateTimestamps()
    {
        $time = $this-&gt;freshTimestamp();

        $updatedAtColumn = $this-&gt;getUpdatedAtColumn();

        if (! is_null($updatedAtColumn) &amp;&amp; ! $this-&gt;isDirty($updatedAtColumn)) {
            $this-&gt;setUpdatedAt($time);
        }

        $createdAtColumn = $this-&gt;getCreatedAtColumn();

        if (! $this-&gt;exists &amp;&amp; ! is_null($createdAtColumn) &amp;&amp; ! $this-&gt;isDirty($createdAtColumn)) {
            $this-&gt;setCreatedAt($time);
        }
    }

    /**
     * Set the value of the &quot;created at&quot; attribute.
     *
     * @param  mixed  $value
     * @return $this
     */
    public function setCreatedAt($value)
    {
        $this-&gt;{$this-&gt;getCreatedAtColumn()} = $value;

        return $this;
    }

    /**
     * Set the value of the &quot;updated at&quot; attribute.
     *
     * @param  mixed  $value
     * @return $this
     */
    public function setUpdatedAt($value)
    {
        $this-&gt;{$this-&gt;getUpdatedAtColumn()} = $value;

        return $this;
    }

    /**
     * Get a fresh timestamp for the model.
     *
     * @return \Illuminate\Support\Carbon
     */
    public function freshTimestamp()
    {
        return Date::now();
    }

    /**
     * Get a fresh timestamp for the model.
     *
     * @return string
     */
    public function freshTimestampString()
    {
        return $this-&gt;fromDateTime($this-&gt;freshTimestamp());
    }

    /**
     * Determine if the model uses timestamps.
     *
     * @return bool
     */
    public function usesTimestamps()
    {
        return $this-&gt;timestamps;
    }

    /**
     * Get the name of the &quot;created at&quot; column.
     *
     * @return string|null
     */
    public function getCreatedAtColumn()
    {
        return static::CREATED_AT;
    }

    /**
     * Get the name of the &quot;updated at&quot; column.
     *
     * @return string|null
     */
    public function getUpdatedAtColumn()
    {
        return static::UPDATED_AT;
    }

    /**
     * Get the fully qualified &quot;created at&quot; column.
     *
     * @return string|null
     */
    public function getQualifiedCreatedAtColumn()
    {
        return $this-&gt;qualifyColumn($this-&gt;getCreatedAtColumn());
    }

    /**
     * Get the fully qualified &quot;updated at&quot; column.
     *
     * @return string|null
     */
    public function getQualifiedUpdatedAtColumn()
    {
        return $this-&gt;qualifyColumn($this-&gt;getUpdatedAtColumn());
    }
}
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