getid3_quicktime::MaybePascal2String( string $pascalstring ): string
- Source
wp-includes/ID3/module.audio-video.quicktime.php:3100
Compatibility
- WordPress
- core
- PHP
- 7.4–8.6-dev
- 6.7.7
- 6.8.8
- 6.9.7
- 7.0.4
- 7.1.0
Present in every tracked release (6.7.7 to 7.1.0), and compiles on PHP 7.4 through 8.6-dev.
Parameters
$pascalstringstring
Return value
string
Performance profile
How much work a call to getid3_quicktime::MaybePascal2String() does, and what it touches: the algorithmic scaling, the Zend instruction count per call across PHP versions, the hooks it hands control to, and the core code that calls it. Measured from the compiled opcodes, not a stopwatch, so every number is identical on any machine running the same PHP version, and every function in core is ranked by cost.
- Cost class
- Trivial
- Scaling
- Constant
- Instructions
- 5–20
- Plugin surface
- None
- Called by
- 1
Touches nothing outside its own arguments.
No loop in the body: the same number of instructions runs whatever you pass in.
Executed per call on PHP 8.5, depending on the branch taken. The body compiles to 23.
Nothing here hands control to plugin code.
1 place in core call this, so the cost is paid more often than your own code shows.
What one call costs · 2 distinct outcomes
One number would be a lie: the work depends on which branch runs. These are every distinct cost getid3_quicktime::MaybePascal2String() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 5 | none |
| always | 15–20 | ord() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 23 | 5–20 | 3 | |
| 8.5 | 23 | 5–20 | 3 | |
| 8.4 | 23 | 5–20 | 3 | 12 fewer instructions than PHP 8.3 |
| 8.3 | 35 | 5–29 | 3 | |
| 8.2 | 35 | 5–29 | 3 | |
| 8.1 | 35 | 5–29 | 3 | |
| 7.4 | 35 | 5–29 | 3 |
An instruction is not a fixed amount of time, so a matching count is not necessarily the same speed; what it rules out is a difference in the work itself.
Used by · 1
Source code
public function MaybePascal2String($pascalstring) { // Pascal strings have 1 unsigned byte at the beginning saying how many chars (1-255) are in the string // Check if string actually is in this format or written incorrectly, straight string, or null-terminated string if (strlen($pascalstring) > 0) { if (ord(substr($pascalstring, 0, 1)) == (strlen($pascalstring) - 1)) { return substr($pascalstring, 1); } elseif (substr($pascalstring, -1, 1) == "\x00") { // appears to be null-terminated instead of Pascal-style return substr($pascalstring, 0, -1); } } return $pascalstring; }Changelog
Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
About this page
- Parsed data
- Generated from the wordpress-develop 7.1.0 tag, from
src/wp-includes/ID3/module.audio-video.quicktime.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it. - Corrections
- Something wrong on this page? Report it and it gets fixed in the next regeneration.