Use external diff tool if TEST_PHP_DIFF_CMD env var is set

Fix run-tests.php --no-progress flag for non-parallel testing

Add --[no-]progress option to run-tests.php (#9255)

Previously, adding the -g argument would disable progress, even locally.
Now it needs to be disabled explicitly.

Hide skipped tests in CI (#9163)

Add opcache.preload_user=root to run-tests.php if root

This prevents breaking the testsuite when running it as root.

[run-tests.php] echo call performance optimization

[run-tests.php] Combine multiple `str_replace` calls to a single `strtr` call

Makes the replacement easier to see, neatly aligned, and only takes one function call.
This is safe because

[run-tests.php] Combine multiple `str_replace` calls to a single `strtr` call

Makes the replacement easier to see, neatly aligned, and only takes one function call.
This is safe because none of the combined replacement values contain tokens that would be recursively replaced.

This also improves the readability on how the regular expressions in `EXPECTF` matcher is constructed.

Co-authored-by: Michael Voříšek <mvorisek@mvorisek.cz>

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[run-tests.php] Replace backtick operator string literals with `shell_exec()` calls

The rationale is that `shell_exec()` is identical to the backtick operator (both of which are disabled whe

[run-tests.php] Replace backtick operator string literals with `shell_exec()` calls

The rationale is that `shell_exec()` is identical to the backtick operator (both of which are disabled when `shell_exec` function is disabled) makes it very clear that it is a shell execution, and eases security audits too.

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[run-tests.php] Merge multiple `unset()` calls to a single call

[run-tests.php] Minor optimizations in `if` blocks by placing simple expressions first

[run-tests.php] Improve non-optimal nested `if`/`elseif`/`else` blocks with happy path optimizations

Simplifies and improves the readability of multiple `if`/`elseif`/`else` blocks by removi

[run-tests.php] Improve non-optimal nested `if`/`elseif`/`else` blocks with happy path optimizations

Simplifies and improves the readability of multiple `if`/`elseif`/`else` blocks by removing them when an earlier branch exists the execution flow by either returning or terminating the script.

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Merge branch 'PHP-8.1'

* PHP-8.1:
Fix --CGI-- support of run-tests.php

Fix --CGI-- support of run-tests.php

The `--CGI--` section is supposed to be just a marker, and to be empty
as such. However, a previous refactoring[1] broke that.

[1] <https:/

Fix --CGI-- support of run-tests.php

The `--CGI--` section is supposed to be just a marker, and to be empty
as such. However, a previous refactoring[1] broke that.

[1] <https://github.com/php/php-src/commit/9140c9038a83ff55a78f357f8485de086d83d94e>

Closes GH-9061.

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Fix "%f" regex in run-tests.php (#8965)

"-.0.0" and "0." is no longer matched wrongly

Merge branch 'PHP-8.1'

Fix GH-8691 Add required extensions for redirected tests

Avoid accessing undefined variables in run-tests.php (#8669)

The $php_cgi and $phpdbg cases here are definitely real bugs, and
caused the script to bail out under certain ini settings.

Avoid accessing undefined variables in run-tests.php (#8669)

The $php_cgi and $phpdbg cases here are definitely real bugs, and
caused the script to bail out under certain ini settings.

The other paths may actually be unreachable in practice, but were
highlighted by PhpStorm.

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[ci skip] Drop ability to send QA reports by email (#8657)

This fails regularly and on top of that we don't look at these reports.

Deprecate ${} string interpolation

https://wiki.php.net/rfc/deprecate_dollar_brace_string_interpolation

Merge branch 'PHP-8.1'

* PHP-8.1:
typo

Merge branch 'PHP-8.0' into PHP-8.1

* PHP-8.0:
typo

typo

Merge branch 'PHP-8.1'

* PHP-8.1:
run-tests.php: fix TypeError: Unsupported operand types: string * int <n> is mandatory for --show-slow and --set-timeout use <n> in help message inste

Merge branch 'PHP-8.1'

* PHP-8.1:
run-tests.php: fix TypeError: Unsupported operand types: string * int <n> is mandatory for --show-slow and --set-timeout use <n> in help message instead of confusing [n]

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Merge branch 'PHP-8.0' into PHP-8.1

* PHP-8.0:
run-tests.php: fix TypeError: Unsupported operand types: string * int <n> is mandatory for --show-slow and --set-timeout use <n> in help

Merge branch 'PHP-8.0' into PHP-8.1

* PHP-8.0:
run-tests.php: fix TypeError: Unsupported operand types: string * int <n> is mandatory for --show-slow and --set-timeout use <n> in help message instead of confusing [n]

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run-tests.php: fix TypeError: Unsupported operand types: string * int <n> is mandatory for --show-slow and --set-timeout use <n> in help message instead of confusing [n]