PHP syntax: decoding the meaning behind symbols

What's this? This is a collection of questions that come up from time to time regarding PHP syntax. This is also a community wiki, so everyone is invited to participate in maintaining this list. why is that? It used to be difficult to find questions about operators and other syntax markers. ¹The mai...

P粉893457026 2023-10-10 14:59:04 0 2 233

Problems encountered when using strpos() PHP function for information retrieval and cropping

I'm getting raw data from an API that contains a JSON and I'm trying to crop out the JSON-only part from the returned data. I used PHP's strpos() function to write a function to trim the JSON from the beginning (the position of the opening brace) to the end (the position of the closing brace). But I...

P粉692052513 2023-09-21 10:35:25 0 1 263

Simplify input of mathematical symbols to make it easier for you on the Internet

Is there a solution for a React library that allows users to easily enter mathematical symbols and have them converted to LaTeX on the backend? I mean, like a user-friendly editor, maybe with clickable buttons? These elements are then converted to LaTeX on the backend.

P粉057869348 2023-09-14 14:13:34 0 1 263

SQL query results are 0 when the string in the database row has a special font

I'm running this query: SELECTidFROMpostsWHEREtitleLIKE '%CERTIFIEDINSTALLER%'; The text in the database is stored as 'ᴄᴇʀᴛɪꜰɪᴇᴅɪɴꜱᴛᴀʟʟᴇʀꜱ' which is a unique font. The above query returns 0 results, but when I change the 'ᴄᴇʀᴛɪꜰɪᴇᴅɪɴꜱᴛᴀʟʟᴇʀꜱ' text font in the database to something like a sans serif ...

P粉029327711 2023-09-11 16:04:04 0 1 257

Is there a CSS-only way to break words on specific non-whitespace characters?

If a word (e.g. THIS_PHRASE_HERE) overflows the div inside it (fixed width), I want to split it with an underscore. I know I can use word-break:break-all to split a word on any character, but that seems a bit confusing, especially if there are 1 or 2 character orphans at the end. I'm sure I can do t...

P粉807397973 2023-09-10 20:24:04 0 2 280

After CSS reset, list items display without marker symbols

So my problem is that something in my css file base.css makes the ol and ul tags not display bullet points nor 1., 2. etc. This is the code of the file: *{margin:0;/*supprimelesmargespardéfaut*/padding:0;/*supprimelepaddingpardéfaut*/font-family:Roboto,Noto,sans-serif;/*définitlapolicedeca

P粉957661544 2023-09-10 12:35:02 0 2 193

Associate variable ID with profile page

I have a page that displays some information from a database. I want to add a link to each row (say the name as a link) that I can click to jump to a page that displays the rest of the information for that row (say a profile page). I thought about creating a link that passes the id to the profile pa...

P粉022285768 2023-09-10 10:56:31 0 1 341

Image not loading in page

I want to load sliding images in a web application and for this I am using Bootstrap carousel. Get pictures from the background. Images are stored in image state. Below is the JSON format for getting the data. images:[{SNO:'1',NAME:'image.jpg',PIC_NAME:'image'}] After uploading the images, they are ...

P粉238433862 2023-09-09 20:59:03 0 1 217

JavaScript error handling special characters †

In a textarea, I want to determine the position of the last "†" character. vartextField=document.getElementById("main_field");console.log(textField.value.indexOf("†"));Text†enteredbyuser

P粉187160883 2023-09-07 19:16:32 0 1 229

I want to create a javascript string so that when it is passed inside a div tag it displays as a list

I'm trying to use JavaScript to display a string containing a list of items in a specific format inside a div tag. The string contains several items that I want to display as a bulleted list. Here is the sample string: constitems="Thesearetheitems:\n1.apple\n2.mango"; I want to format the ...

P粉478445671 2023-09-03 23:13:31 0 2 320

Why doesn't the URL constructor encode parentheses in the query string?

In JavaScript, the URL constructor does not encode brackets and parentheses when they appear in a query string, whereas encodeURI or encodeURIComponent always encodes them. This confuses me because most sources say to use encodeURI/encodeURIComponent for encoding when you include special characters ...

P粉287254588 2023-09-03 21:05:00 0 1 198

Special characters causing problems with Joi validation

I want to limit the content in the text box to 250 words. I am using joi validation to achieve this. It should count all characters (including special characters) and only allow 250 words. But I encountered the following problem. As soon as the first special character appears, even after 3 words, I ...

P粉267791326 2023-08-31 09:52:18 0 1 240

Way to restrict date picker to only accept numbers and hyphens, and restrict other values in Vue

I'm using the vue2-datepickernpm package to handle dates. Date input accepts all letters, numbers and special characters. But I want the input to only accept numbers, hyphens and slashes. I can easily achieve this using normal html input. But how to implement it in date picker? Any help would be gre...

P粉729518806 2023-08-26 14:57:04 0 1 303

What is the difference between single and double quoted strings in PHP?

I'm a little confused why I see some code in PHP where strings are put in single quotes and sometimes in double quotes. I just know that in .NET, or C, if it's in single quotes, that means it's a character, not a string.

P粉773659687 2023-08-23 20:46:33 0 2 338

How to access object properties with special characters?

I have a formDOM element: varvirDom=document.getElementsByTagName("form")[0]; virDom has two fields with IDs, creditId and pwdId... I can access virDom.creditId without issue, but virDom.pwdId.. causes a syntax error due to the period in the name. How can I access such a property?

P粉463824410 2023-08-23 00:26:33 0 1 288

Syntax highlighting color setting for tag in HTML

In code snippets like the one below... classFoo{internalFoo(){for(inti=0;i<42;++i);}}... when they are displayed in my browser, various Keywords etc. will be colored. When I click "View Source" I don't see any special HTML code to achieve this coloring. So how is this color highligh...

P粉032649413 2023-08-22 16:48:45 0 2 343