Fungsi Kontrol Output PHP
Fungsi Kontrol Output PHP
PHP menyediakan serangkaian fungsi yang mengontrol konten apa yang dikirim ke browser dan kapan. Ini disebut sebagai kontrol keluaran .
Output dapat berasal dari salah satu sumber berikut:
echo
,print
,printf
,print_r
... dan fungsi dan pernyataan serupa lainnya- Pemberitahuan, peringatan, dan kesalahan dari PHP
- Konten apa pun di luar
<?php ?>
tag
PHP dan backend yang menjalankannya dapat menyimpan output dalam buffer sebelum mengirimkannya ke pengguna.
Catatan: Fungsi kontrol output dapat membuat sejumlah buffer output. Output buffer menangkap output yang diberikan oleh program. Setiap buffer output baru ditempatkan di atas tumpukan buffer output, dan setiap output yang diberikannya akan ditangkap oleh buffer di bawahnya. Fungsi kontrol output hanya menangani buffer paling atas, jadi buffer paling atas harus dihilangkan untuk mengontrol buffer di bawahnya.
Instalasi
Fungsi kontrol output PHP adalah bagian dari inti PHP. Tidak diperlukan instalasi untuk menggunakan fungsi-fungsi ini.
Konfigurasi Waktu Proses
Perilaku fungsi kontrol keluaran dipengaruhi oleh pengaturan di php.ini:
Name | Default | Description | Version |
---|---|---|---|
output_buffering | "0" | Enables output buffering for all PHP files by default | 4 |
output_handler | NULL | Set the name of the default function which handles the output of all output buffers | 4 |
implicit_flush | "0" | Enables implicit flush, which causes output to be sent directly to the browser on each output statement | 4 |
url_rewriter.tags | "a=href,area=href, frame=src,form=,fieldset=" | Indicates which HTML tags and attributes can be modified by the URL rewriter (the output_add_rewrite_var() function.) | 4.3 |
url_rewriter.hosts | The current value of $_SERVER['HTTP_HOST'] | URL rewriting is only done on the server's own URLs by default. To allow for rewriting URLs of other websites, set the hostnames of the other websites here. | 7.1 |
Fungsi Kontrol Output PHP
Method | Function |
---|---|
flush() | Attempts to send content from the system's output buffer to the browser |
ob_clean() | Deletes all of the content from the topmost output buffer |
ob_end_clean() | Deletes the topmost output buffer and all of its contents |
ob_end_flush() | Deletes the topmost output buffer and outputs its contents |
ob_flush() | Outputs the contents of the topmost output buffer and clears the buffer |
ob_get_clean() | Returns all of the contents of the topmost output buffer and clears the buffer |
ob_get_contents() | Returns the contents of the topmost output buffer |
ob_get_flush() | Outputs and returns the contents of the topmost output buffer and then deletes the buffer |
ob_get_length() | Returns the number of bytes of data that are in the topmost output buffer |
ob_get_level() | Returns a number indicating how many output buffers are on the stack |
ob_get_status() | Returns information about the output buffers |
ob_gzhandler() | Used as a callback function for ob_start() to compress the contents of the buffer when sending it to the browser |
ob_implicit_flush() | Turns implicit flushing on or off |
ob_list_handlers() | Returns an array of callback function names that are being used by the topmost output buffer |
ob_start() | Creates a new output buffer and adds it to the top of the stack |
output_add_rewrite_var() | Used to append query string parameters to any URL in the output |
output_reset_rewrite_vars() | Removes all variables added by output_add_rewrite_var() |