SMTP::startTLS(): bool
- Source
wp-includes/PHPMailer/SMTP.php:486
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.
Return value
bool
Performance profile
How much work a call to SMTP::startTLS() 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
- 9
- Plugin surface
- None
- Called by
- 0
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. The body compiles to 30.
Nothing here hands control to plugin code.
Nothing in core calls this; the cost is only what you spend yourself.
What one call costs · 1 distinct outcome
One number would be a lie: the work depends on which branch runs. These are every distinct cost SMTP::startTLS() can have, taken from its control-flow graph on PHP 8.5.
| When | Instructions | Calls it makes |
|---|---|---|
| always | 9 | call_user_func_array() |
Across PHP versions
| PHP | Compiled | Executed | Branches | Notes |
|---|---|---|---|---|
| 8.6-dev | 30 | 9 | 1 | |
| 8.5 | 30 | 9 | 1 | |
| 8.4 | 30 | 9 | 1 | |
| 8.3 | 30 | 9 | 1 | |
| 8.2 | 30 | 9 | 1 | |
| 8.1 | 30 | 9 | 1 | 9 more instructions than PHP 7.4 |
| 7.4 | 21 | 7–20 | 1 |
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.
Uses · 1
- \PHPMailer\PHPMailer\SMTP::sendCommand()
Source code
public function startTLS() { if (!$this->sendCommand('STARTTLS', 'STARTTLS', 220)) { return false; } //Allow the best TLS version(s) we can $crypto_method = STREAM_CRYPTO_METHOD_TLS_CLIENT; //PHP 5.6.7 dropped inclusion of TLS 1.1 and 1.2 in STREAM_CRYPTO_METHOD_TLS_CLIENT //so add them back in manually if we can if (defined('STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT')) { // phpcs:ignore PHPCompatibility.Constants.NewConstants.stream_crypto_method_tlsv1_2_clientFound $crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_2_CLIENT; // phpcs:ignore PHPCompatibility.Constants.NewConstants.stream_crypto_method_tlsv1_1_clientFound $crypto_method |= STREAM_CRYPTO_METHOD_TLSv1_1_CLIENT; } //Begin encrypted connection set_error_handler(function () { call_user_func_array([$this, 'errorHandler'], func_get_args()); }); $crypto_ok = stream_socket_enable_crypto( $this->smtp_conn, true, $crypto_method ); restore_error_handler(); return (bool) $crypto_ok; }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/PHPMailer/SMTP.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.