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

namespace Illuminate\Validation\Rules;

use Illuminate\Support\Traits\Conditionable;

class Dimensions
{
    use Conditionable;

    /**
     * The constraints for the dimensions rule.
     *
     * @var array
     */
    protected $constraints = [];

    /**
     * Create a new dimensions rule instance.
     *
     * @param  array  $constraints
     * @return void
     */
    public function __construct(array $constraints = [])
    {
        $this-&gt;constraints = $constraints;
    }

    /**
     * Set the &quot;width&quot; constraint.
     *
     * @param  int  $value
     * @return $this
     */
    public function width($value)
    {
        $this-&gt;constraints['width'] = $value;

        return $this;
    }

    /**
     * Set the &quot;height&quot; constraint.
     *
     * @param  int  $value
     * @return $this
     */
    public function height($value)
    {
        $this-&gt;constraints['height'] = $value;

        return $this;
    }

    /**
     * Set the &quot;min width&quot; constraint.
     *
     * @param  int  $value
     * @return $this
     */
    public function minWidth($value)
    {
        $this-&gt;constraints['min_width'] = $value;

        return $this;
    }

    /**
     * Set the &quot;min height&quot; constraint.
     *
     * @param  int  $value
     * @return $this
     */
    public function minHeight($value)
    {
        $this-&gt;constraints['min_height'] = $value;

        return $this;
    }

    /**
     * Set the &quot;max width&quot; constraint.
     *
     * @param  int  $value
     * @return $this
     */
    public function maxWidth($value)
    {
        $this-&gt;constraints['max_width'] = $value;

        return $this;
    }

    /**
     * Set the &quot;max height&quot; constraint.
     *
     * @param  int  $value
     * @return $this
     */
    public function maxHeight($value)
    {
        $this-&gt;constraints['max_height'] = $value;

        return $this;
    }

    /**
     * Set the &quot;ratio&quot; constraint.
     *
     * @param  float  $value
     * @return $this
     */
    public function ratio($value)
    {
        $this-&gt;constraints['ratio'] = $value;

        return $this;
    }

    /**
     * Convert the rule to a validation string.
     *
     * @return string
     */
    public function __toString()
    {
        $result = '';

        foreach ($this-&gt;constraints as $key =&gt; $value) {
            $result .= &quot;$key=$value,&quot;;
        }

        return 'dimensions:'.substr($result, 0, -1);
    }
}
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