imagecreatefrompng - Create a new image from file or URL - PHP

resource imagecreatefrompng ( string $filename )

Create a new image from file or URL

imagecreatefrompng() returns an image identifier representing the image obtained from the given filename


<?php
function LoadPNG($imgname)
{
    /* Attempt to open */
    $im = @imagecreatefrompng($imgname);

    /* See if it failed */
    if(!$im)
    {
        /* Create a blank image */
        $im  = imagecreatetruecolor(150, 30);
        $bgc = imagecolorallocate($im, 255, 255, 255);
        $tc  = imagecolorallocate($im, 0, 0, 0);

        imagefilledrectangle($im, 0, 0, 150, 30, $bgc);

        /* Output an error message */
        imagestring($im, 1, 5, 5, 'Error loading ' . $imgname, $tc);
    }

    return $im;
}header('Content-Type: image/png');$img = LoadPNG('bogus.image');imagepng($img);imagedestroy($img);?>

PHPで画像を縮小してアップロードする

Make sure GD Library is enabled and "PNG Support" is must enabled in GD Library.

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count_chars - Count Number of character of string with PHP

mixed count_chars ( string $string [, int $mode = 0 ] )

Return information about characters used in a string

Mode value can have 0-5 and return following results

1. 0 - Return an array with the byte-value as key and the frequency of every byte as value.
2. 1 - same as 0 but only byte-values with a frequency greater than zero are listed.
3. 2 - same as 0 but only byte-values with a frequency equal to zero are listed.
4. 3 - a string containing all unique characters is returned.
5. 4 - a string containing all not used characters is returned.

Counts the number of occurrences of every byte-value (0..255) in string and returns it in various ways.


<?php
$data = "Two Ts and one F.";

foreach (count_chars($data, 1) as $i => $val) {
   echo "There were $val instance(s) of \"" , chr($i) , "\" in the string.\n";
}?>

065 PHP من الألف إلى الياء Arabic التعامل مع النصوص Strings pt1

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